Accession Number:

ADA046461

Title:

Prediction of Transitory Stall in Two-Dimensional Diffusers.

Descriptive Note:

Interim rept.,

Corporate Author:

STANFORD UNIV CALIF THERMOSCIENCES DIV

Personal Author(s):

Report Date:

1976-12-01

Pagination or Media Count:

184.0

Abstract:

A computer program has been developed that predicts the performance of diffusers operating in the transitory stall region, including the region of optimum recovery at fixed length. Results agree with data to the uncertainty in existing data. The important changes in method that underlie this advance are two i simultaneous calculation of the outer flow and the separating layer which eliminates singular behavior in the zone of flow detachment ii an improved boundary layer method that adequately approximates backflows near the wall and also represents both attached and free shear layers with good accuracy the method employs Bradshaws entrainment-shear miximum correlation, which is shown to hold over an extended range of flow conditions. Comparisons of the boundary layer scheme with the data of the 1968 Conference on Computation of Turbulent Boundary Layers and with the separating flow data of Strickland and Simpson both show good agreement in H, delta, C sub f2. Author

Subject Categories:

  • Machinery and Tools
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE