MASS FLOW MEASUREMENT IN THE INLET OF A TRANSONIC AXIAL COMPRESSOR
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Authors
Grant, Travis M.
Subjects
transonic rotor
transonic compressor
mass flow rate measurement
computational fluid dynamics
CFD
axial compressor
bell mouth
rake probe
transonic compressor
mass flow rate measurement
computational fluid dynamics
CFD
axial compressor
bell mouth
rake probe
Advisors
Gannon, Anthony J.
Smith, Walter
Date of Issue
2021-06
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
This study sought to determine the discharge coefficient of the inlet bell mouth of a transonic compressor rig both experimentally and through computational fluid dynamics. The new inlet bell mouth was integrated into the test rig to provide more favorable flow conditions for more accurate measurement of the mass flow rate entering the rig. A computational fluid dynamics analysis was conducted using a 3-D model of the inlet of the test rig to obtain a preliminary prediction of the flow profile in the bell mouth. This analysis drove the design of a rake probe of pitot tubes that was mounted in the exit plane of the bell mouth to measure the actual flow profile. This allowed for the calculation of the actual mass flow rate, which could then be compared to the ideal mass flow rate to produce a discharge coefficient. This discharge coefficient can be used in future testing as a method of calculating the actual mass flow rate from only the measured ideal mass flow rate.
Type
Thesis
Description
Series/Report No
Department
Mechanical and Aerospace Engineering (MAE)
Organization
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NPS Report Number
Sponsors
Funder
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Citation
Distribution Statement
Approved for public release. Distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.