Accession Number : ADA111785

Title :   Rotational Flow in a Curved-Wall Diffuser Designed by Using the Inverse Method of Solution of Potential Flow Theory,


Personal Author(s) : Yang,Tah-teh ; Ntone,Francois

PDF Url : ADA111785

Report Date : 14 May 1981

Pagination or Media Count : 15

Abstract : Curved wall diffusers designed by using an inverse method of solution of potential flow theory have been shown to be both short and highly efficient. These features make this type of diffuser attractive in thrust ejector applications. In ejectors, however, the flow at the diffuser inlet is nearly a uniform shear flow. This paper presents a method used in examining the flow velocity along the diffuser wall and some of the analytical results for diffusers designed with potential flow theory and receiving a rotational flow. The inlet flow vorticity and the diffuser area ratios prescribed in the inverse solution of the irrotational flow are the parameters of the study. The geometry of a sample ejector using such a diffuser and its estimated thrust augmentation ratio are also presented. (Author)

Descriptors :   *Diffusers, Axisymmetric, Potential flow, Walls, Curvature, Rotation, Ejectors, Thrust augmentation, Vortices, Parametric analysis, Inversion, Flow rate, Suction slots, Computer aided design

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE