Experimental investigation of particle-laden underexpanded jet flow

Jain, Ari

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https://hdl.handle.net/2142/116098 Copy

Description

Title

Experimental investigation of particle-laden underexpanded jet flow

Author(s)

Jain, Ari

Issue Date

2022-07-19

Director of Research (if dissertation) or Advisor (if thesis)

• Villafane, Laura
• Panerai, Francesco

Department of Study

Aerospace Engineering

Discipline

Aerospace Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• multiphase flow
• underexpanded jet
• mach disc

Abstract

An experimental investigation of underexpanded particle-laden jet flows is conducted. The key parameter varied in the study is the mass loading ratio: the proportion of particle mass flow to air mass flow. A robust experimental setup is designed, calibrated, and built to produce repeatable data. Schlieren imagery with a horizontal knife edge and high speed Chronos camera were used to analyze the shock structure of the resulting underexpanded jet. Comparisons were made between Mach disc offset distance for unladen and laden flow. Contrary to literature, it is found that the Mach disc distance in particle-laden flow is dependent on both nozzle pressure ratio and mass loading ratio. Unladen data shows good agreement with literature and the Mach disc in laden flow is seen to move upstream with the addition of particles, as expected from force and momentum ex-change. Only qualitative comparisons are made to limited literature studies as mass loading ratios tested in this study, 0.5 – 2, were higher than those of literature, < 1. Further work is necessary to find a detailed empirical relationship between Mach disc offset distance, mass loading ratio, and nozzle pressure ratio.

Graduation Semester

2022-08

Type of Resource

Thesis

Copyright and License Information

Copyright 2022 Arihant Jain

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