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The Upstream Effect on Back Pressure Ratio in Fluid Dynamics

Explore how upstream conditions impact back pressure ratio, with insights into geometric effects and transition region discharge coefficients in fluid dynamics.

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The Upstream Effect on Back Pressure Ratio in Fluid Dynamics

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  1. The upstream effect on back pressure ratio Chunhui Li, lich@nim.ac.cn NIM, P. R. China

  2. Background

  3. The experimental system

  4. Reynolds number effect

  5. Type I-SN.8601

  6. Type II-SN.8602

  7. Geometrical effect

  8. 10mm-6。

  9. Conclusions • The upstream condition or flow condition effect can be positive or negative, which may be related with the ration of the tube diameter to the throat diameter? • The measurement of CBPR on site may be necessary?

  10. Discharge coefficient in transition region How to relate the discharge coefficient and Reynolds number during the transition region!

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