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Correlations of Fuel and Helium Flow for Holes with Very Small Leak Rates
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Abstract
The relationship between the leak rate of hydrocarbons (HC) and helium through small channels is being evaluated. Measurements of the flow of HC down micro-channels through walls are compared with theoretical models. It is shown that a realistic model for fuel micro-leaks is that of a channel with length/diameter >> 1. HC flow through such channels is shown to be laminar for driving pressures of at least 3 kPa. These results may be used to provide upper bounds for fuel loss estimates using helium leak detection techniques.
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Armentrout, C., Strandberg, C., and Golchert, K., "Correlations of Fuel and Helium Flow for Holes with Very Small Leak Rates," SAE Technical Paper 970310, 1997, https://doi.org/10.4271/970310.Also In
References
- McMaster, Robert C. Nondestructive Testing Handbook Vol. 1 Am. Soc. Nondest. Testing 1982 0-87170-125-1 89 100
- Most fluid mechanics texts discuss this problem Massey, B. S. Mechanics of Fluids Van Nostrand Reinhold (International) Co. Ltd. London 5th 1983 0-442-30552-4 87 91
- Vacuum Technology, Inc. Oak Ridge TN, USA
- Resonetics, Inc. Nashua NH, USA
- The CFD code used was FIDAP® Fluid Dynamics International, Inc. Evanston, IL, USA