Concentration probe measurements in a Mach 4 nonreacting hydrogen jet

Buttsworth, David R. and Jones, Terry V. (2003) Concentration probe measurements in a Mach 4 nonreacting hydrogen jet. Journal of Fluids Engineering, 125 (4). pp. 628-635. ISSN 0098-2202

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A new probe technique is introduced for the measurement of concentration in binary gas flows. The new technique is demonstrated through application of the probe in a Mach 4 nonreacting jet of hydrogen injected into a nominally quiescent air environment. Previous concentration probe devices have mostly used hot wires or hot films within an aspirating probe tip. However, the new technique relies on Pitot pressure and stagnation point transient thin film heat flux probe measurements. The transient thin film heat flux probes are operated at a number of different temperatures and thereby provide stagnation temperature and heat transfer coefficient measurements with an uncertainty of around ±5K and ±4% respectively. When the heat transfer coefficient measurements are combined with the Pitot pressure measurements, it is demonstrated that the concentration of hydrogen within the mixing jet can be deduced. The estimated uncertainty of the reported concentration measurements is approximately ±5% on a mass fraction basis.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: The full text of this item cannot be accessed in USQ EPrints due to publisher copyright restrictions.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 11 Oct 2007 01:17
Last Modified: 02 Jul 2013 22:48
Uncontrolled Keywords: probe technique; measurement; concentration; binary gas flows; Mach 4 nonreacting hydrogen jet
Fields of Research : 02 Physical Sciences > 0203 Classical Physics > 020303 Fluid Physics
02 Physical Sciences > 0203 Classical Physics > 020304 Thermodynamics and Statistical Physics
09 Engineering > 0915 Interdisciplinary Engineering > 091508 Turbulent Flows
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1115/1.1595671

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