Title

Measurement of reflected-shock bifurcation over a wide range of gas composition and pressure

Authors

Authors

E. L. Petersen;R. K. Hanson

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Shock Waves

Keywords

bifurcation; shock tube; reflected shock; boundary layer; TUBE; Mechanics

Abstract

To determine the extent and magnitude of reflected-shock bifurcation in shock-tube chemistry studies at elevated pressures, experiments were performed using a simple laser schlieren technique and a fast- response pressure transducer. The laser schlieren diagnostic provided a quantitative measurement of the normal-shock passage, an event normally obscured in pressure signals by the bifurcated region. A range of gas mixtures covering molecular weights from 14.7 to 44.0 and specific heat ratios from 1.29 to 1.51 was explored. The results were combined with a standard gas dynamic model to determine the time of arrival of the normal shock wave, the size and strength of the bifurcated region, and the characteristic passage times of dominant features. All results could be expressed in empirical correlations as functions of the gas properties and shock speed. The measured size of the bifurcation zone increased with increasing shock velocity and decreasing specific heat ratio, but displayed no pressure dependence for the conditions of this study (P(5) = 11 - 265 atm., T(5) = 780 - 1740 K).

Journal Title

Shock Waves

Volume

15

Issue/Number

5

Publication Date

1-1-2006

Document Type

Article

Language

English

First Page

333

Last Page

340

WOS Identifier

WOS:000240126300005

ISSN

0938-1287

Share

COinS