Accession Number : AD0666079

Title :   INFLUENCE OF PRESSURE ON INDICES OF COMBUSTION PROCESSES AND HEAT EXCHANGE IN HEAT-RESISTANT COMBUSTION CHAMBERS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Ivanov,V. M.

Report Date : 23 AUG 1967

Pagination or Media Count : 30

Abstract : An analysis of the effect of pressure on the combustion of liquid or gaseous fuels in combustion chambers was made under the following assumptions: (1) The fuel is uniformly distributed in the air stream; (2) the liquid droplets have the same size and pressure changes do not affect atomization; (3) the velocity of the fuel droplets and the gas stream are equal, and (4) the fuel consumption and air flow rates are constant so that the combustion process takes place at a constant air excess factor. Relationships were derived for the length of the combustion zone of liquid and gaseous fuels as a function of pressure. The effect of pressure on heat transfer in the combustion chamber was also analyzed. The results were compared with previous experimental data obtained with kerosene, diesel fuel, and solar oil. The analysis showed that the length of the combustion zone of gaseous and liquid fuel decreases inversely in relation to the pressure while the heat release per unit volume increases with the square of the pressure. Radiative heat transfer does not exceed 25-30% of the total heat transfer so that no separate section for radiative transfer is required in the type of combustion chambers studied. (Author)

Descriptors :   (*FUELS, *COMBUSTION), (*COMBUSTION CHAMBERS, PRESSURE), HEAT TRANSFER, HEAT RESISTANT MATERIALS, DROPS, LIQUIDS, GASES, FUEL CONSUMPTION, GAS FLOW, KEROSENE, FUEL OIL, USSR

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE