Combustion Gas Sampling Valve

Abstract
A valve suitable for extracting a sample of high temperature, high pressure gases and introducing this sample into a low pressure regime has been developed and successfully operated for two years. Slow combustion reaction studies in a normally‐fired spark‐ignition engine are being accomplished with the aid of this gas sampling valve located in the combustion chamber end‐gas region. The valve exhibits excellent sealing, achieves choked flow conditions, and permits sampling times on the order of 1 msec. The construction, operation, and monitoring of this gas sampling valve are described.

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