Thank you for your kind words! I’m glad you enjoyed the video. Creating content on "electrical twice line frequency" sounds like a great idea-I’ll add it to my list for future topics. Please feel free to share the video with your colleagues and engineering fellows who might find it helpful. Your support means a lot!

@RotorDynamics Thanks and sure, I will share.

Thank you for your kind feedback! I’m glad you’re finding the videos helpful. To answer your question: No, these mode shapes are not planar. Feel free to share the videos with your colleagues and fellow engineers-it’s always great to engage with more people interested in these topics. Your support is greatly appreciated!

Thank you so much for your kind words! I'm glad you found this video helpful.

Appreciate it! If you'd like to explore more about this topic, check out the other videos in the series. :)

I recommend reaching out to the XLrotor software support team for assistance with installation and troubleshooting.

Thanks for watching!

Great question! During the impact test, the peak amplitude in the response revealed the natural frequency of the system. In this case, the first peak occurred at 196 Hz.

Thank you! If you found this video helpful, please share it with colleagues who might benefit from it. :)

Thank you for your comment! Abradable seal technology is indeed fascinating and has been around for quite a while, as you mentioned. While this particular video focused on other aspects of the topic, I'll consider dedicating a future video to explaining the design and performance benefits of abradable seals in rotating machinery. Your feedback is appreciated, and it helps improve the content for everyone. Stay tuned!

Thank you! If you find the videos on the channel helpful, feel free to share them with your colleagues who might benefit from them too.

Thank you! If you find the videos helpful, feel free to share them with your colleagues.

Thank you ! If you think your colleagues would find the videos valuable, please feel free to share. I’d love to help spread the knowledge further!

Thank you so much for your kind words! 😊 Yes, I create and manage this channel on my own, drawing from years of experience in engineering and maintenance. It’s my way of sharing valuable insights with others in the field. Please feel free to share it with your colleagues-I hope they enjoy the videos as much as you do!

In this case, the severe bowing was caused by water entering (or quenching) the hot turbine. For a deeper dive, please refer to Part 31 of the videos on your KZbin channel. :)

Yes, that's right. :)

Thanks for the feedback! I'm glad the content resonates with your experience - it sounds like you've done some impressive work in your master's! Composite materials are such an exciting area for your PhD, and there's so much potential for innovation. Best of luck with your research!

Thank you so much for your kind words and for following the channel! The Newkirk effect is an excellent suggestion for a video topic. It's a fascinating phenomenon in rotor dynamics, and I'd love to cover it in more detail. I'll add it to my list of upcoming topics. Thanks again for your input-it's always great to hear from viewers like you!

You're welcome! I'm glad you found the video helpful. If you have any questions or suggestions for future topics, feel free to let me know!

Thank you so much for the kind words! I'm glad you found the videos helpful. If you have any questions or suggestions for future topics, feel free to share!

That's a great question. Seal-induced instability is often observed in high-performance turbomachinery, such as rocket engines, and has been extensively studied by Dr. Childs. Indeed, seals can influence critical speed by either increasing or decreasing it. However, in most conventional machines, where there is a lower pressure difference, seals typically do not cause instability. Instead, seals are primarily used to reduce leakage. In compressors, for instance, seals play a crucial role in minimizing leakage, which directly enhances the machine's efficiency.

Your question suggests that you may be relatively new to designing rotating equipment. It's important to note that temperature stabilizes over time rather than increasing indefinitely. This allows for an optimal fit between the bearing, shaft, and housing. In most cases, the bearing acts as the primary heat source, while the housing functions as a heat sink. As a result, the thermal expansion will typically be greater on the bearing side compared to the housing.

Thank you so much for the generous support! 🙌 I'm really glad you found the explanation helpful. It means a lot to me that you're enjoying the content. If you have any other questions or topics you'd like to explore, feel free to let me know. Thanks again for your support!

Thank you so much for the kind words! I'm really glad you're enjoying the content and that it’s been helpful to you. 🙌 I appreciate your subscription! 😊 That’s a great topic suggestion! I’ll definitely look into creating content covering the differences between open and closed impellers, blade geometry, and design considerations like diameter, number of blades, angles, and blade height. Stay tuned-I'll be sure to announce it when it’s ready! In the meantime, feel free to check out my other videos on compressors and rotating equipment. Thanks again for your support! 🔥

Looks like you mentioned a few names there-anything specific you'd like to discuss or ask about? 😊 Let me know how I can help!

You're very welcome! Glad you found the video helpful. If you have any other questions or topics you'd like to see, feel free to let me know. Thanks for watching!

Thank you! If you found this video helpful, please feel free to share it with your colleagues.

Thank you! If you found this video helpful, please feel free to share it with your colleagues. :)

That's a great question! If your rotor dynamic analysis primarily shows rocking modes, low-speed balancing might be sufficient. However, if the separation margin with the flexible mode is limited (check out Part 7 and Part 9 for more details), it's generally advisable to perform high-speed balancing as well. This ensures you address the rotor's behavior throughout the entire operating range.

Great question. To address this, performing a rotor dynamics analysis is essential, and you can compare the results with physical tests. Additionally, conducting a balance sensitivity study using rotor dynamics software will provide deeper insights. If the analysis shows that the rocking mode is dominant, low-speed balancing should suffice.

Thanks! Glad you enjoyed the video! 🙌 If you have any questions or suggestions for future content, feel free to share!

That's a great question. Yes, 'arc springs' are one option. Another method for connecting the inner clearance to the outer clearance is through a squirrel cage design.

@@RotorDynamics Thanks for your kind reply and excellent work. Keep it up.

Hahaha. Why? All the measured values are actual measurements.

Thank you so much for the kind words! 🙏 It really means a lot to know that my videos are making a difference and passing on valuable knowledge to future generations. That’s exactly why I started the channel! If there’s anything else you'd like to see or learn about, feel free to let me know. Thanks again for your support!

There all many ways estimate stiffness and damping. I am just showing one example. Yes, using peaks from time domain to estimate damping is very well known method.

This is excellent question. The typical gap is mentioned at the end of Part 12 of our video series, which covers the H6 and H7 loose fit. Please refer to Part 12 for more details. Additionally, most companies conduct reliability tests to fine-tune the tolerances for their specific applications.

Many thanks, I wil :) keep up the great work. I love your videos

Thank you so much! I'm glad to hear that you enjoy the videos. Your support means a lot to me. If you have any topics you'd like to see covered in future videos, feel free to let me know!

Thanks so much! I'm glad you enjoyed the video. If you have any questions or topics you'd like me to cover in future videos, feel free to let me know!

@@RotorDynamics Can you demonstrate a harmonic analysis of a composite inducer in a liquid oxygen environment? What would some failure modes look like? What about cavitation?

Great question! The topic you suggest is very specific, and analyzing failure modes in such conditions typically falls into three main categories: Resonance: This occurs if the operating frequency matches one of the natural frequencies, leading to excessive vibrations. Material Degradation: Prolonged exposure to liquid oxygen can deteriorate the mechanical properties of composite materials, causing brittleness or micro-cracking. Thermal Stress: The temperature differential between the operational environment and the inducer material can cause thermal stresses, resulting in cracking or structural failure. For cavitation, detection and prevention are crucial. Using CFD simulations can help identify potential cavitation areas. Design modifications, such as optimizing the geometry, can mitigate these effects. :)

Thank you very much for your feedback. I will ensure there is less brink in the Shorts. However, please note that Shorts are brief teasers for our longer videos. For more in-depth content, especially on balancing (Part 24), please check out the full-length videos on my KZbin channel. :)

Thank you very much! Will do. :)

Haha, I appreciate that! 😊 Some of the concepts can definitely be tricky, but I’m glad you still enjoyed the video! Feel free to ask if you ever want a deeper explanation-I’m happy to help break things down. Thanks for watching!

Thank you for your feedback. We noticed that the audio quality in Part 1 was subpar, and we will be re-recording and releasing an improved version soon. Please feel free to share any further feedback you may have. :)