13th Aerospace Sciences Meeting 1975
DOI: 10.2514/6.1975-143
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Cryogenic nitrogen as a transonic wind-tunnel test gas

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Cited by 11 publications
(6 citation statements)
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“…It is worth noting that the isentropic relation for real gases does not align perfectly with Equation (3). For simplicity, pressure and density can still be related using the same equation, albeit with a different expansion coefficient denoted as α [2]. Therefore, the isentropic relation can be reformulated as…”
Section: Isentropic Expansion Of Cryogenic Nitrogenmentioning
confidence: 99%
See 1 more Smart Citation
“…It is worth noting that the isentropic relation for real gases does not align perfectly with Equation (3). For simplicity, pressure and density can still be related using the same equation, albeit with a different expansion coefficient denoted as α [2]. Therefore, the isentropic relation can be reformulated as…”
Section: Isentropic Expansion Of Cryogenic Nitrogenmentioning
confidence: 99%
“…The primary solution to address the challenge of low Reynolds numbers in large wind tunnels involves integrating cryogenic technology with wind tunnel systems, resulting in the creation of cryogenic wind tunnels. These specialized wind tunnels typically employ nitrogen as the test gas [1,2]. In comparison to conventional wind tunnels, cryogenic wind tunnels raised pressure levels, and the reduced temperature led to a lower viscosity of the test gas.…”
Section: Introductionmentioning
confidence: 99%
“…Submitted Sept. 4,1979. This paper is declared a work of the U.S. Government and therefore is in the public domain.…”
Section: Application Of Unsteady Airfoilmentioning
confidence: 98%
“…4, such an equation can be derived from thermodynamics. From de= T ds-p dv (2) with entropy s-and specific volume v we get, expressing the total differential dsin terms of differentials in rand v,…”
Section: Thermodynamicsmentioning
confidence: 99%
“…The local adiabatic exponent is defined for a differential change in state by 12 v ( dp \ p a= --(--) = -a 2 p \ dv / s p…”
Section: * and A From The Equations Of Statementioning
confidence: 99%