Analytical Determination of the Airflow Rate Through a Venturi at Low Subsonic Mach Number.

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Abstract:

Because the experimental determination of the air mass flow coefficient for a large venturi is very cumbersome, time consuming and costly, an analytical method was developed which yields a high accuracy, within or - 12 percent. With this method, the air mass flow through a subsonic venturi is calculated from the total pressure and temperature and the throat wall static pressure whereby the mass flux variation across the throat, the real gas properties and the boundary layer in the throat are considered. For a specific venturi of 58 inch throat diameter, operated at high pressure, the calculating method and the resulting mass flow coefficient are presented. This method, including a computer program to calculate the flow field through the venturi, can conveniently used to determine the flow coefficient for an arbitrary venturi contour. Author

Author(s):
Huber, Franz J. A. ; Weeks, Thomas M. ; Powers, Gregory
Author Organization(s):
AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OHIO
Descriptive Note:
Final rept. Feb 74-Mar 75,
Pagination:
0036

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFFDL-TR-76-26
Task Number(s):
198802
Project Number(s):
AF-1988
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*BOUNDARY LAYER, *FLOW RATE, *SUBSONIC FLOW, *VENTURI TUBES, TEMPERATURE, COMPUTATIONS, DISPLACEMENT, VARIATIONS, FLOW FIELDS, PRESSURE
Field(s)/Group(s):
Test Facilities, Equipment and Methods, Fluid Mechanics
Keyword(s):
*Air mass flow coefficient, Discharge coefficient
Report Date:
1976 May 01