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Semi-Empirical Analysis of Liquid Fuel Distribution Downstream of a Plain Orifice Injector Under Cross-Stream Air Flow PUBLIC ACCESS

[+] Author Affiliations
Cao Ming-hua

Beijing Institute of Aeronautics and Astronautics

Jiang Hong-kun, Chin Ju-shan

Purdue University, West Lafayette, IN

Paper No. 82-GT-16, pp. V002T02A002; 9 pages
doi:10.1115/82-GT-16
From:
  • ASME 1982 International Gas Turbine Conference and Exhibit
  • Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery
  • London, England, April 18–22, 1982
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7957-3
  • Copyright © 1982 by ASME

abstract

An improved semi-empirical analysis is presented for the liquid fuel distribution downstream of a plain orifice fuel injector under cross-stream airflow of uniform high velocity and constant ambient temperature. The analysis is based on a simplified “flat-fan spray” model (ε – ψ model). The ε – ψ model is proposed which assumes that the fuel injected through the orifice forms a flat-fan liquid sheet with an average fan angle 2 ψ0. Once the droplets have been formed, the trajectory of individual droplets determines the fuel distribution downstream. The validity of the analysis is confirmed by comparison of calculations based on the ε – ψ model and test data obtained from fuel distribution experiments under cross-stream air flow of ambient temperature. The agreement is shown to be very good. The semi-empirical analysis presented offers a very useful approach in the preliminary design of the fan air flow path portion of turbo-fan after-burners.

Copyright © 1982 by ASME
Topics: Fuels , Air flow , Ejectors
This article is only available in the PDF format.

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