Accession Number : AD0614695

Title :   SOME EXPERIMENTS ON THE FLOW OF A RAREFIED GAS THROUGH A CIRCULAR ORIFICE,

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

Personal Author(s) : Sreekanth,A. K.

Report Date : DEC 1963

Pagination or Media Count : 42

Abstract : The mass flow of nitrogen gas through a circular orifice was measured at five Knudsen number values between 0.13 and 1.78 for a range of upstream-to-downstream pressure ratios from 1 to 18. The Knudsen number in this case is defined as the ratio of upstream mean free path to the diameter of the orifice. For extremely low pressure ratios across the orifice the present results show a very smooth transition from the continuum flow theoretical value, at very low Knudsen numbers, to the free molecule flow limit. Using a free molecule flow pressure probe, some pressure measurements were taken to study the structure of the jet downstream of the orifice. (Author)

Descriptors :   (*GAS FLOW, ORIFICES), RINGS, NITROGEN, LOW PRESSURE, FLUID MECHANICS, GRAPHICS, EXPERIMENTAL DATA

Distribution Statement : APPROVED FOR PUBLIC RELEASE