Analytical Investigation of High Performance, Short, Thrust Augmenting Ejectors.

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Abstract:

A procedure for analyzing thrust augmenting ejectors having a short, curved-wall diffuser is presented. In this type of diffuser a shear flow is admitted at the inlet and a set of auxiliary ejectors is used to provide the necessary boundary layer control. Several computer programs are used in the analytical procedure. These computer programs are either outlined or referenced in the open literature. A users manual is provided in the Appendices of this report. A discussion of the geometries and performances, including thrust augmentation ratios, of two sample ejectors determined by use of this analytical procedure with mixing chamber contraction as an optimization parameter is presented. Use of the mixing chamber length as an optimization parameter is also discussed. Author

Author(s):
Yang, Tah-teh ; Ntone, Francois
Author Organization(s):
CLEMSON UNIV SC DEPT OF MECHANICAL ENGINEERING
Descriptive Note:
Theoretical phase rept. Apr 80-Apr 81,
Pagination:
0070

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AERO/1274/CU-ME-F-1-81, DTNSRDC/ASED-CR-1-82
Contract/Grant Number(s):
N00167-80-C-0040
Monitor Series:
CR-1-82
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_1_Force Support; JCA_1.2_Force Preparation; JCA_4.6_Engineering; JCA_1.2.3_Educating
Modernization Areas:
Quantum Science and Computing
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*DIFFUSERS, *THRUST AUGMENTATION, *EJECTORS, COMPUTER PROGRAMS, USER MANUALS, AUXILIARY, OPTIMIZATION, MASS FLOW, FLOW RATE, LENGTH, SLOTS, WALLS, MIXING, JET FLOW, BOUNDARY LAYER CONTROL, CURVED PROFILES
Field(s)/Group(s):
Fluid Mechanics, Jet and Gas Turbine Engines
Keyword(s):
High performance ejection, Short thrust augmenting ejectors, Thrust augmenting ejectors, Curved wall diffusers, Griffith diffusers, Mixing chambers
Report Date:
1982 Jan 04