Accession Number : ADP000524

Title :   Study of Three-Dimensional Thrust-Augmenting Ejectors,

Corporate Author : MCDONNELL DOUGLAS CORP ST LOUIS MO

Personal Author(s) : Agarwal,Ramesh K.

Report Date : JUN 1982

Pagination or Media Count : 18

Abstract : A theory is presented for the prediction of thrust augmentation characteristics of a three-dimensional ejector configuration in which a series of rectangular-hypermixing nozzles pumps the secondary air in a constant-area or slowly diverging channel. Based on the theory, a computer program is developed which requires the ejector design parameters, the empirical constants in the eddy viscosity model, and the nozzle pressure ratio as input and calculates the entrained secondary mass flow, the secondary and exit velocities, the net thrust and the thrust augmentation ratio. Good agreement is found between the theoretical prediction and the experimental data.

Descriptors :   *Ejectors, *Thrust augmentation, *Thrust augmentor nozzles, Workshops, Three dimensional, Configurations, Mass flow, Secondary flow, Computer programs, Input, Aerospace craft, Short takeoff aircraft, Vertical takeoff aircraft, Experimental data, Mathematical models

Distribution Statement : APPROVED FOR PUBLIC RELEASE