STUDY OF TRANSIENT JET GASES

Authors
  1. Saber, A.J.
Corporate Authors
Defence Research Establishment Suffield, Ralston ALTA (CAN);Concordia Univ, Montreal QUE (CAN) Dept of Mechanical Engineering
Abstract
Studies of the transient expansion of jet gases continue. The work includes a review of optical techniques for investigating gaseous flows and a review of numerical modelling of such flows. To examine the flows a prototype gas pulsing system has been constructructed. The system involves a solenoid valve overdriven to achieve sub-millisecond opening times and modified to achieve closure with similar speed. Open times are from 3 to 16 ms. The pulse is observed with a piezoelectric pressure gauge mounted on a hypodermic syringe as a probe. Visual observation have been made using two mirror laser schlieren and laser "light slicing" techniques. Maps of the pressure field have been made and photos of "relatively fast" and "relatively slow" steady flows have been made. A flashlamp illumination system is under construction for time resolved schlieren and light slicing observations. Future work suggestions are outlined.
Report Number
DRES-CR-4/86 — Interim Report 1, Contractor Report
Date of publication
15 Nov 1985
Number of Pages
74
DSTKIM No
86-02662
CANDIS No
125058
Format(s):
Hardcopy;Originator's fiche received by DSIS

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