TS-39 Static Pressure Recovery of Compressible Flow in Radial Vaneless Diffusers(Session B-5: Unsteady Flow 2)

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概要

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• The incompressible and compressible flows in vaneless diffusers are analyzed by using a one-dimensional friction theory. The total pressure loss coefficient ζ and the static pressure recovery coefficient Cp with various parameters are calculated. Cp for incompressible and compressible flows are compared, and the effect of compressibility on the performance is discussed. It is found that Cp decreases rapidly with the decrease of α_i and dCp/dα_i is very large when the inlet flow angle is low. The compressibility enlarges the value of Cp, and Cp increases with the Mach number. However, the compressibility makes the slope of pressure recovery versus the flow angle large. This leads to the compressor more unstable. When the inlet Mach number is high, the operating range of the machine is confined by the diffuser. From these results, the mechanism of compressor surge is considered.

• 1999-11-14

著者

• Mizuki Shimpei

  Hosei University Department Of Mechanical Engineering

• DOU Hua-Shu

  The University of Sydney Department of Mechanical & Mechatronic Engineering

• Dou Hua-shu

  The University Of Sydney Department Of Mechanical & Mechatronic Engineering

関連論文

• TS-39 Static Pressure Recovery of Compressible Flow in Radial Vaneless Diffusers(Session B-5: Unsteady Flow 2)

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