Simulation of combustion in a rocket engine with Ansys Fluent

[@SB-rf2ye]

This is a really well made tutorial. Well described, and educational. Subscribed to learn more from your team.

[@chemicalpropulsionlaboratory]

Awesome, thank you!

[@persinarugabriel00]

You should first solve in steady state. After convergence you switch it to non-stationary

[@chemicalpropulsionlaboratory]

Coordinates file: 1 1 -124.89731 124.89731 0 1 2 51.09146 124.89731 0 1 3 56.76487 124.84609 0 1 4 62.43644 124.69245 0 1 5 68.1043 124.43644 0 1 6 73.76662 124.07815 0 1 7 79.42155 123.61768 0 1 8 85.06724 123.0552 0 1 9 90.70186 122.39087 0 1 10 96.32356 121.62493 0 1 11 101.93053 120.75762 0 1 12 107.52091 119.78922 0 1 13 113.09291 118.72005 0 1 14 118.64469 117.55045 0 1 15 124.17445 116.28082 0 1 16 129.68039 114.91155 0 1 17 135.16071 113.4431 0 1 18 140.61362 111.87595 0 1 19 146.03736 110.21061 0 1 20 151.43014 108.44762 0 1 21 156.79021 106.58755 0 1 22 162.11583 104.63102 0 1 23 167.40526 102.57865 0 1 24 172.65677 100.43112 0 1 25 177.86865 98.18913 0 1 26 183.03921 95.85341 0 1 27 188.16675 93.42472 0 1 28 193.24961 90.90386 0 1 29 198.28613 88.29164 0 1 30 203.27467 85.58891 0 1 31 208.2136 82.79656 0 1 32 281.13424 40.69581 0 1 33 281.93311 40.24414 0 1 34 282.74001 39.80698 0 1 35 283.55467 39.38445 0 1 36 284.37682 38.9767 0 1 37 285.2062 38.58386 0 1 38 286.04254 38.20606 0 1 39 286.88556 37.84342 0 1 40 287.73499 37.49605 0 1 41 288.59055 37.16408 0 1 42 289.45197 36.84761 0 1 43 290.31897 36.54675 0 1 44 291.19125 36.26158 0 1 45 292.06854 35.99221 0 1 46 292.95055 35.73873 0 1 47 293.83699 35.50121 0 1 48 294.72757 35.27973 0 1 49 295.62201 35.07436 0 1 50 296.52001 34.88518 0 1 51 297.42128 34.71224 0 1 52 298.32553 34.55561 0 1 53 299.23245 34.41532 0 1 54 300.14177 34.29143 0 1 55 301.05316 34.18397 0 1 56 301.96636 34.09299 0 1 57 302.88104 34.01851 0 1 58 303.79692 33.96056 0 1 59 304.7137 33.91915 0 1 60 305.63107 33.89429 0 1 61 306.54875 33.88601 0 1 62 307.01621 33.89445 0 1 63 307.24975 33.90501 0 1 64 307.48306 33.91977 0 1 65 307.71606 33.93875 0 1 66 307.94869 33.96193 0 1 67 308.18085 33.98931 0 1 68 308.41249 34.02088 0 1 69 308.64352 34.05663 0 1 70 308.87386 34.09654 0 1 71 309.10345 34.14061 0 1 72 309.3322 34.18882 0 1 73 309.56005 34.24114 0 1 74 309.78691 34.29758 0 1 75 310.01272 34.3581 0 1 76 310.2374 34.42269 0 1 77 310.46087 34.49133 0 1 78 311.91104 34.94981 0 1 79 313.36122 35.40572 0 1 80 314.81139 35.85905 0 1 81 316.26157 36.30981 0 1 82 317.71174 36.75799 0 1 83 319.16191 37.20359 0 1 84 320.61209 37.64661 0 1 85 322.06226 38.08705 0 1 86 323.51244 38.52491 0 1 87 324.96261 38.96019 0 1 88 326.41278 39.39288 0 1 89 327.86296 39.82299 0 1 90 329.31313 40.25051 0 1 91 330.76331 40.67545 0 1 92 332.21348 41.09779 0 1 93 333.66366 41.51755 0 1 94 335.11383 41.93471 0 1 95 336.564 42.34928 0 1 96 338.01418 42.76126 0 1 97 339.46435 43.17065 0 1 98 340.91453 43.57744 0 1 99 342.3647 43.98163 0 1 100 343.81487 44.38322 0 1 101 345.26505 44.78222 0 1 102 346.71522 45.17861 0 1 103 348.1654 45.57241 0 1 104 349.61557 45.9636 0 1 105 351.06575 46.35219 0 1 106 352.51592 46.73817 0 1 107 353.96609 47.12152 0 1 108 355.41627 47.50227 0 1 109 356.86644 47.88041 0 1 110 358.31662 48.25593 0 1 111 359.76679 48.62885 0 1 112 361.21696 48.99916 0 1 113 362.66714 49.36685 0 1 114 364.11731 49.73193 0 1 115 365.56749 50.09439 0 1 116 367.01766 50.45424 0 1 117 368.46784 50.81146 0 1 118 369.91801 51.16607 0 1 119 371.36818 51.51806 0 1 120 372.81836 51.86743 0 1 121 374.26853 52.21418 0 1 122 375.71871 52.5583 0 1 123 377.16888 52.8998 0 1 124 378.61905 53.23867 0 1 125 380.06923 53.57492 0 1 126 381.5194 53.90853 0 1 127 382.96958 54.23952 0 1 128 384.41975 54.56788 0 1 129 385.86992 54.8936 0 1 130 387.3201 55.21668 0 1 131 388.77027 55.53711 0 1 132 390.22045 55.8549 0 1 133 391.67062 56.17006 0 1 134 393.1208 56.48258 0 1 135 394.57097 56.79246 0 1 136 396.02114 57.0997 0 1 137 397.47132 57.40429 0 1 138 398.92149 57.70625 0 1 139 400.37167 58.00556 0 1 140 401.82184 58.30223 0 1 141 403.27201 58.59625 0 1 142 404.72219 58.88763 0 1 143 406.17236 59.17635 0 1 144 407.62254 59.46243 0 1 145 409.07271 59.74586 0 1 146 410.52289 60.02663 0 1 147 411.97306 60.30475 0 1 148 413.42323 60.58022 0 1 149 414.87341 60.85303 0 1 150 416.32358 61.12317 0 1 151 417.77376 61.39063 0 1 152 419.22393 61.65544 0 1 153 420.6741 61.91758 0 1 154 422.12428 62.17706 0 1 155 423.57445 62.43388 0 1 156 425.02463 62.68804 0 1 157 426.4748 62.93953 0 1 158 427.92498 63.18835 0 1 159 429.37515 63.43451 0 1 160 430.82532 63.67799 0 1 161 432.2755 63.91881 0 1 162 433.72567 64.15696 0 1 163 435.17585 64.39243 0 1 164 436.62602 64.62523 0 1 165 438.07619 64.85536 0 1 166 439.52637 65.08281 0 1 167 440.97654 65.30758 0 1 168 442.42672 65.52966 0 1 169 443.87689 65.74904 0 1 170 445.32706 65.96573 0 1 171 446.77724 66.17975 0 1 172 448.22741 66.39108 0 1 173 449.67759 66.59972 0 1 174 451.12776 66.80568 0 1 175 451.56616 66.86749 0 2 1 -124.89731 0 0 2 2 451.56616 0 0 3 1 -124.89731 0 0 3 2 -124.89731 124.89731 0 4 1 451.56616 0 0 4 2 451.56616 66.86749 0

[@apoorvmishra6992]

the import chemkins function doesn't recognize the data file format. Could you please send me the files I'm not getting from the link you provided.

[@durixflorian9199]

Hello, Im trying to do it with another geometry but it doesn't work, can you help me ?

[@shashwatgupta7720]

This is a really awesome tutorial. I have subscribed your channel and have also started watching the lecture playlists. It would be great if you could make a tutorial for solid rocket motors or if possible guide me as i need it for my project.

[@fhqjklasdf]

Thank you for your tutorial!!! I got a question... Although it is a liquid & gaseous combustion problem (therefore, there is a phase change), you don't have to turn on the Multiphase option?

[@CannedBullets]

Any idea why my Fluent stays stuck after I select "Calculate Flamelets". Like Ansys Fluent will just stay on "Generating flamelets simultaneously at 3 compute nodes" and not let me do anything else.

[@chemicalpropulsionlaboratory]

I can only guess, never saw such an issue on an appropriately configured machine. Maybe some installation problem, or problem with paths. Ansys Fluent accepts only Latin letters in the path and file name. No special characters allowed (á, ã, í, ô, etc.).

[@corymitchell3228]

Hi! Mind if you point me towards some references for the axisymetric method of characteristics you used? Thanks!

[@ShamJam85]

the link you shared does not contain thermo file for KErosene. Where can i get the data from for Kero?

[@chemicalpropulsionlaboratory]

CERFACS Chemistry website

[@MalikHassan-iy7gj]

I want the dimensions of the diagram

[@danilbagautdinov3140]

Hi! I don't know if you're still responding to the message, but could you send the ansys file please? I can't figure out how Ansys determines which openings fuel and oxidizer are coming through.

[@chemicalpropulsionlaboratory]

Hello. Please send me your e-mail address to [e-mail]

[@anandakrishnansatheeshpv6623]

Hey did you get the files

[@purnateja8218]

HOW DID YOU MAKE INLETS AND THOART SEPARATION PLANE

[@chemicalpropulsionlaboratory]

I've created it with a sketch tool in Design Modeller.

[@akashvidhate4512]

How to get kinematics input file??

[@chiefxb3204]

Hello! Professor, I would like to know if you teach in other languages too.

[@kashishkorotania4701]

A very nice and informative tutorial, thanks for the upload. I wish to simulate the combustion of Propane with Nitrous Oxide, but I'm not sure from where to get the reaction mechanism? I tried downloading and importing the chemical kinetics and thermodynamics database files provided by, "CRECK' but my Fluent immediately crashed when I hit import. It happened several times and I've no clue about it. I suspect the problem is in the file format, but I tried importing the CRECK mechanism files in .dat format as well, but again my fluent crashed. I would really appreciate some help and guidance in this matter. Looking forward to a reply soon. Thanks, cheers!

[@alidag1433]

Hi ,Where is the chamber coordinates

[@chemicalpropulsionlaboratory]

Hello. They are in the first comment to this video.

[@SuperYashraj11]

@@chemicalpropulsionlaboratory No they are not

[@anandakrishnansatheeshpv6623]

Great tutorial sir, I am not sure whether you are still responding to the comments, but if possible can you please send me the ANSYS file. Thanks in advance.

[@CannedBullets]

Are you modeling the fuel injection as sonic injection?

[@chemicalpropulsionlaboratory]

It's a constant mass flow inlet. Ansys fluent automatically calculates the injector flow properties according to the pressure in the combustion chamber. It can be sonic or subsonic.

[@qihao2405]

Hello professor！ What if I use MMH/NTO as the propellants，and I set two injections through DPM without inlet boundary to analyze the conbustion in the nozzle，is this method workable？ Looking forward to your reply！

[@chemicalpropulsionlaboratory]

Hello. Simulation of MMH/NTO is not much different from the current one, you (just) need an appropriate Chemkin library to realize it. CPL does not work with these propellants.

[@qihao2405]

@@chemicalpropulsionlaboratory uh，I see. Thanks for your answer！

[@sakshipandit887]

I m not getting file to upload in chemkin mechanism

[@chemicalpropulsionlaboratory]

Hello. I've sent you the link by e-mail.

[@arslanhaider2200]

@SAKSHI PANDIT Ma'am, if you have the files. plz send me.

[@sakshipandit887]

@@arslanhaider2200 yes sure . Please provide me your e mail id

[@SonuSingh0114]

Hey can i get the file if you still have it?

[@GutInst1nct]

Hello, I was curious, how long did it take for your simulation to run for all 20,000 time steps?

[@chemicalpropulsionlaboratory]

Hello. It took roughly 15 min on an ordinary machine.

[@GutInst1nct]

@@chemicalpropulsionlaboratory Interesting, I am running into some very long run-times curious what the problem might be. Would I be able to have a copy of the ansys files you used if you still have them?

[@Kanakrajkota]

Thanks for this informative video. Can you please share your ansys file so that it help me for better understanding

[@Scoobydontt]

How to proceed with LOX and Lh2 fuel?

[@chemicalpropulsionlaboratory]

You'll need to include a biphasic model in the simulation. Hopefully, I'll make a video about this case in the future.

[@Scoobydontt]

@@chemicalpropulsionlaboratory Anytime soon? it’ll help a lot for my ongoing project!

[@SonuSingh0114]

Hey! Did you complete the lox and lh2 analysis?

[@SonuSingh0114]

Hoping for a reply asap. 🙂

[@rafiulalam1998]

Excellent tutorial. However when I tried to run it, my fluent crashed. Can I pls have the files?

[@chemicalpropulsionlaboratory]

Of course. Inform me your e-mail, please.

[@rafiulalam1998]

rafiulalam1998

[@rafiulalam1998]

@chemicalpropulsionlaborato499 Hi it's my usrnm and g📧. My comments are getting deleted automatically.

[@anandakrishnansatheeshpv6623]

@@rafiulalam1998hey did you get the files

[@CannedBullets]

Was your operating pressure set to sea level conditions or 0 Pa?

[@chemicalpropulsionlaboratory]

Hello. The calculation was set to 0 Pa to avoid a shockwave in the nozzle.

[@user-un9ej7th6j]

Very helpful and informative

[@thecros1076]

Sir can you please send the design modler points i cannot see them in comments

[@chemicalpropulsionlaboratory]

sent by e-mail

[@akashvidhate4512]

@@chemicalpropulsionlaboratory send plz

[@chemicalpropulsionlaboratory]

@@akashvidhate4512 Coordinates file: 1 1 -124.89731 124.89731 0 1 2 51.09146 124.89731 0 1 3 56.76487 124.84609 0 1 4 62.43644 124.69245 0 1 5 68.1043 124.43644 0 1 6 73.76662 124.07815 0 1 7 79.42155 123.61768 0 1 8 85.06724 123.0552 0 1 9 90.70186 122.39087 0 1 10 96.32356 121.62493 0 1 11 101.93053 120.75762 0 1 12 107.52091 119.78922 0 1 13 113.09291 118.72005 0 1 14 118.64469 117.55045 0 1 15 124.17445 116.28082 0 1 16 129.68039 114.91155 0 1 17 135.16071 113.4431 0 1 18 140.61362 111.87595 0 1 19 146.03736 110.21061 0 1 20 151.43014 108.44762 0 1 21 156.79021 106.58755 0 1 22 162.11583 104.63102 0 1 23 167.40526 102.57865 0 1 24 172.65677 100.43112 0 1 25 177.86865 98.18913 0 1 26 183.03921 95.85341 0 1 27 188.16675 93.42472 0 1 28 193.24961 90.90386 0 1 29 198.28613 88.29164 0 1 30 203.27467 85.58891 0 1 31 208.2136 82.79656 0 1 32 281.13424 40.69581 0 1 33 281.93311 40.24414 0 1 34 282.74001 39.80698 0 1 35 283.55467 39.38445 0 1 36 284.37682 38.9767 0 1 37 285.2062 38.58386 0 1 38 286.04254 38.20606 0 1 39 286.88556 37.84342 0 1 40 287.73499 37.49605 0 1 41 288.59055 37.16408 0 1 42 289.45197 36.84761 0 1 43 290.31897 36.54675 0 1 44 291.19125 36.26158 0 1 45 292.06854 35.99221 0 1 46 292.95055 35.73873 0 1 47 293.83699 35.50121 0 1 48 294.72757 35.27973 0 1 49 295.62201 35.07436 0 1 50 296.52001 34.88518 0 1 51 297.42128 34.71224 0 1 52 298.32553 34.55561 0 1 53 299.23245 34.41532 0 1 54 300.14177 34.29143 0 1 55 301.05316 34.18397 0 1 56 301.96636 34.09299 0 1 57 302.88104 34.01851 0 1 58 303.79692 33.96056 0 1 59 304.7137 33.91915 0 1 60 305.63107 33.89429 0 1 61 306.54875 33.88601 0 1 62 307.01621 33.89445 0 1 63 307.24975 33.90501 0 1 64 307.48306 33.91977 0 1 65 307.71606 33.93875 0 1 66 307.94869 33.96193 0 1 67 308.18085 33.98931 0 1 68 308.41249 34.02088 0 1 69 308.64352 34.05663 0 1 70 308.87386 34.09654 0 1 71 309.10345 34.14061 0 1 72 309.3322 34.18882 0 1 73 309.56005 34.24114 0 1 74 309.78691 34.29758 0 1 75 310.01272 34.3581 0 1 76 310.2374 34.42269 0 1 77 310.46087 34.49133 0 1 78 311.91104 34.94981 0 1 79 313.36122 35.40572 0 1 80 314.81139 35.85905 0 1 81 316.26157 36.30981 0 1 82 317.71174 36.75799 0 1 83 319.16191 37.20359 0 1 84 320.61209 37.64661 0 1 85 322.06226 38.08705 0 1 86 323.51244 38.52491 0 1 87 324.96261 38.96019 0 1 88 326.41278 39.39288 0 1 89 327.86296 39.82299 0 1 90 329.31313 40.25051 0 1 91 330.76331 40.67545 0 1 92 332.21348 41.09779 0 1 93 333.66366 41.51755 0 1 94 335.11383 41.93471 0 1 95 336.564 42.34928 0 1 96 338.01418 42.76126 0 1 97 339.46435 43.17065 0 1 98 340.91453 43.57744 0 1 99 342.3647 43.98163 0 1 100 343.81487 44.38322 0 1 101 345.26505 44.78222 0 1 102 346.71522 45.17861 0 1 103 348.1654 45.57241 0 1 104 349.61557 45.9636 0 1 105 351.06575 46.35219 0 1 106 352.51592 46.73817 0 1 107 353.96609 47.12152 0 1 108 355.41627 47.50227 0 1 109 356.86644 47.88041 0 1 110 358.31662 48.25593 0 1 111 359.76679 48.62885 0 1 112 361.21696 48.99916 0 1 113 362.66714 49.36685 0 1 114 364.11731 49.73193 0 1 115 365.56749 50.09439 0 1 116 367.01766 50.45424 0 1 117 368.46784 50.81146 0 1 118 369.91801 51.16607 0 1 119 371.36818 51.51806 0 1 120 372.81836 51.86743 0 1 121 374.26853 52.21418 0 1 122 375.71871 52.5583 0 1 123 377.16888 52.8998 0 1 124 378.61905 53.23867 0 1 125 380.06923 53.57492 0 1 126 381.5194 53.90853 0 1 127 382.96958 54.23952 0 1 128 384.41975 54.56788 0 1 129 385.86992 54.8936 0 1 130 387.3201 55.21668 0 1 131 388.77027 55.53711 0 1 132 390.22045 55.8549 0 1 133 391.67062 56.17006 0 1 134 393.1208 56.48258 0 1 135 394.57097 56.79246 0 1 136 396.02114 57.0997 0 1 137 397.47132 57.40429 0 1 138 398.92149 57.70625 0 1 139 400.37167 58.00556 0 1 140 401.82184 58.30223 0 1 141 403.27201 58.59625 0 1 142 404.72219 58.88763 0 1 143 406.17236 59.17635 0 1 144 407.62254 59.46243 0 1 145 409.07271 59.74586 0 1 146 410.52289 60.02663 0 1 147 411.97306 60.30475 0 1 148 413.42323 60.58022 0 1 149 414.87341 60.85303 0 1 150 416.32358 61.12317 0 1 151 417.77376 61.39063 0 1 152 419.22393 61.65544 0 1 153 420.6741 61.91758 0 1 154 422.12428 62.17706 0 1 155 423.57445 62.43388 0 1 156 425.02463 62.68804 0 1 157 426.4748 62.93953 0 1 158 427.92498 63.18835 0 1 159 429.37515 63.43451 0 1 160 430.82532 63.67799 0 1 161 432.2755 63.91881 0 1 162 433.72567 64.15696 0 1 163 435.17585 64.39243 0 1 164 436.62602 64.62523 0 1 165 438.07619 64.85536 0 1 166 439.52637 65.08281 0 1 167 440.97654 65.30758 0 1 168 442.42672 65.52966 0 1 169 443.87689 65.74904 0 1 170 445.32706 65.96573 0 1 171 446.77724 66.17975 0 1 172 448.22741 66.39108 0 1 173 449.67759 66.59972 0 1 174 451.12776 66.80568 0 1 175 451.56616 66.86749 0 2 1 -124.89731 0 0 2 2 451.56616 0 0 3 1 -124.89731 0 0 3 2 -124.89731 124.89731 0 4 1 451.56616 0 0 4 2 451.56616 66.86749 0

[@akashvidhate4512]

@@chemicalpropulsionlaboratory how oto do injectors part

[@chemicalpropulsionlaboratory]

@@akashvidhate4512 Thank you for your interest. There was nothing to mention. It was drawn as a sketch in the DesignModeler.

[@ahmedalnemr3282]

where is the coordinates file ?

[@chemicalpropulsionlaboratory]

It is in the first comment.

[@nicolasgoyes7444]

Can you share ansys files to check? regards from Ecuador

[@chemicalpropulsionlaboratory]

Sure! Please send me privately your e-mail

[@anandakrishnansatheeshpv6623]

@@chemicalpropulsionlaboratoryhey did you get the files

[@muhammadhazimbinmohdfuziup352]

Great tutorial. Can you share the Ansys file to check?

[@chemicalpropulsionlaboratory]

Of course! Please send me your email privately

[@ShahbazSholapure]

Did you receive it?

[@anandakrishnansatheeshpv6623]

@@ShahbazSholapurehey did you get the files

[@ShahbazSholapure]

@@anandakrishnansatheeshpv6623 no

[@izzatnajmibinmohdyaacobupm3438]

Nice simulation tutorial. Can you share ansys files to check? regards

[@chemicalpropulsionlaboratory]

Yes, please let me know your e-mail. Olexiy

[@anandakrishnansatheeshpv6623]

Hey did you get the files

[@SonuSingh0114]

Hey sir. This is such a great tutorial. Can you please share with me the ansys file to check? I'm a student and I'm working on a similar problem. Thank you sir.

[@alexandrerichard9297]

What a great simulation and well described. Are your combustion library able to do the same but with a motor working on LOX + Ethanol propellants ?

[@chemicalpropulsionlaboratory]

Thank you, Alexandre. I believe for ethanol you will need to find another combustion library and implement a two-phase flow for LOX evaporation.

[@pradantyawahyuwibisana8677]

Hello, I'm just wanna say first of all thank you for the tutorial, very helpful for beginner like me :) Secondly, On the more theoretical side, I'm curious about the detailed explanation on why this simulation will never converge, as you said with it being "due to transient by-nature combustion process". Can u further elaborate a bit on that statement, or maybe direct me to literature that detailing that reasoning? Your help will be very much appreciated.

[@chemicalpropulsionlaboratory]

Thank you for your interest. The turbulent compressible flow with combustion and local transonic effects could never be stationary. There are a lot of good books on turbulence and combustion. I can't recommend the specific book because it depends on your location and reseller availability.

[@pradantyawahyuwibisana8677]

Okay, thank you for your explanation :)

[@nikhilsamudrala4207]

I think it is not working.. U have not shown the complete setup

[@akashvidhate4512]

How to add injectors in the geometry part

[@nikhilsamudrala4207]

@@akashvidhate4512 kzbin.info/www/bejne/qZiWm5atj6yLg5Y see this video he explained in a very detailed manner

[@chemicalpropulsionlaboratory]

I'm sorry that your project is not working. Hope, other videos could help you.

[@jimmytulpe6211]

Really nice tutorial. Can you please send me the ansys files. Especially the design modeller file. I cannot find your E-Mail Adresse in the Chanel information.

[@chemicalpropulsionlaboratory]

please see here: fga.unb.br/cpl/contato

[@arslanhaider2200]

@@chemicalpropulsionlaboratory Sir, I have contacted you earlier as well via gmail. It will be an act of goodwill in helping me out. Regards

[@dr.sattaraljabair6251]

Can you share ansys files to check? regards

[@chemicalpropulsionlaboratory]

Yes. Please send me your e-mail in a private message.

[@robc4136]

@@chemicalpropulsionlaboratory Hi, interesting video. Can you please send me too the ansys files for reconstructing and proceed the simulation. I will write you an mail by using the address deposited in your channel info. Thank you in advance.

[@fareesahussain3736]

can i please get the geometry file, it's difficult to make sections for feul