Accession Number:

AD0262142

Title:

APPLICATION OF A HYDROCARBON TRACER TECHNIQUE TO GAS PHASE MASS TRANSFER INVESTIGATIONS

Descriptive Note:

Corporate Author:

STANFORD UNIV CALIF

Personal Author(s):

Report Date:

1961-08-01

Pagination or Media Count:

1.0

Abstract:

INFORMATION REGARDING THE MASS TRANSFER OCCURRING IN A FLUID FLOW SITUATION IS OFTEN OF INTEREST. Experimentally, mass transfer can be determined through the use of some kind of tracer technique. A particular technique is described involving the use of small concentrations of hydrocarbon gas as a tracer in conjunction with a very sensitive hydrocarbon detector to measure its spread. The detector, utilizes the principle of flame ionization for the detection of hydrocarbons in a sample of the flow. The technique is illustrated by applying it to the case of the turbulent jet mixing in an air-air ejector. Ethane is used as the tracer gas, and measured concentrations for the tests are in the range 0 to 0.04 mole percent ethane. The technique is seen to give meaningful data about the mass transfer occurring in the jet mixing process. Nondimensional concentration profiles are obtained showing the spread of concentration in the mixing region. Comparison with velocity and temperature data obtained by Mitchell indicates that temperature and mass spread alike while the spread of velocity is slower and of a different nature. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE