Accession Number : AD0697170

Title :   THE LONGSHOT FREE-PISTON CYCLE. PART I. THEORY.

Descriptive Note : Technical note,

Corporate Author : VON KARMAN INST FOR FLUID DYNAMICS RHODE-SAINT-GENESE (BELGIUM)

Personal Author(s) : Enkenhus,Kurt R. ; Parazzoli,Claudio

Report Date : NOV 1968

Pagination or Media Count : 73

Abstract : An approximate analytical solution is presented for the free-piston cycle in the VKI Longshot Hypersonic Tunnel. The Longshot differs from a conventional gun tunnel in that a heavy piston is used to compress the nitrogen test gas, which is then trapped at the end of the barrel at very high pressure by the closing of a system of check valves as the piston rebounds. Real gas effects are accounted for by assuming that the nitrogen behaves as a Van der Waals gas with variable specific heats. (Author)

Descriptors :   (*HYPERSONIC WIND TUNNELS, THEORY), ATMOSPHERE ENTRY, HYPERSONIC CHARACTERISTICS, PISTONS, APPROXIMATION(MATHEMATICS), NITROGEN, PRESSURE, SPECIFIC HEAT, GAS FLOW, BELGIUM

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE