Accession Number : AD0259540

Title :   A VOLATILITY EXPRESSION FOR VAPOR-LOCK CONTROL

Corporate Author : SOUTHWEST RESEARCH INST SAN ANTONIO TEX ARMY FUELS AND LUBRICANTS RESEARCH LAB

Personal Author(s) : BOWDEN,JOHN N.

Report Date : DEC 1959

Pagination or Media Count : 1

Abstract : A large number of experimental and commercial fuels were tested for vapor-forming cha acteristics with a vapor/liquid ratio apparatus. From these data, an indicator was developed and called the TVL index, which expresses the vaporlocking tendencies of a fuel. Vehicle vapor-lock tests served to correlate the laboratory work with the performance of fuels in vehicles and to tentatively establish volatility limits for military gasoline in terms of temperaturevapor/liquid ratio relationships. The TVL index limits would curtail the use of high concentrations of pentane as the pressurizing agent and would allow more use of fuels with relatively high Reid vapor pressures but low vapor-locking tendencies. The proposed limits are consistent with current Reid vapor pressure and ASTM distillation requirements for military gasoline; however, as an alternate recommendation, these could be modified slightly to eliminate fuels with high vapor-locking tendencies and to include those with low vapor-locking tendencies. (Author)

Descriptors :   *GASOLINE, FUEL SYSTEMS, LIQUIDS, PROCUREMENT, QUALITY CONTROL, TEMPERATURE, VAPOR PRESSURE, VAPORIZATION, VAPORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE