Accession Number : AD0752605

Title :   Diaphragm Rupture Effects on an Expanding Flow in a Tube.

Descriptive Note : Final rept. 1 Jan 70-1 Dec 71,

Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Walchli,Lawrence A.

Report Date : AUG 1972

Pagination or Media Count : 67

Abstract : The fundamental problem of diaphragm rupture was studied experimentally to determine the effects on an expanding flow in an evacuated tube. Effects on the expanding flow field included general degradation of the free stream state and flow properties, establishment of shock patterms in the flow, slight source-flow effects, and turbulence from the ruptured diaphragm edges. In general, the later regions of the expanding flow became more uniform as the expansion into the evacuated tube continued. It was concluded that the use of low-shear-strength diaphragm material such as rubber-coated nylon was necessary to assure the rapid development of a shock-free flow field in an expansion to vacuum. (Author)

Descriptors :   (*DIAPHRAGMS(MECHANICS), RUPTURE), (*SHOCK TUBES, DIAPHRAGMS(MECHANICS)), NYLON, RUBBER COATINGS, TURBULENCE, SHOCK WAVES, STABILITY, VACUUM, FLOW VISUALIZATION, TEST METHODS

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE