Experimental study of liquid fuel boilover behavior in normal and low pressures

Abstract

Summary To elucidate the effect of pressure on liquid fuel boilover, a series of field experiments were carried out using a portable measuring setup at Hefei (Alt.: 0 m, P: 101 kPa) and Lhasa (Alt.: 3650 m, P: 64 kPa). It is found that for a given size of pan, the boilover premonitory onset time tp and the boilover onset time tb are delayed; the intensity of boilover is weaker in low pressure. For a given pressure, tp and tb in larger pan are shorter. In addition, the boiling point of water is still the critical of boilover premonitory period in low pressure, and the critical temperature at the interface is reduced as pressure drops when boilover occurs. Then a prediction equation was made to explain the effect of atmospheric pressure on tp and tb, which proves that the pan diameter has a negative correlation against with tp and tb, and there is a negative correlation between the boilover premonitory onset time tp and the low pressure PL when PL > 10 kPa.

A Survey of Flow Field and Combustion Characteristics under Subatmospheric Pressure

“…It was observed that the boiling point and flash point decreased with decreasing pressure, while the lean flammability increased with decreasing pressure. Chen [99] established a flash point prediction model considering environmental pressure and obtained results similar to those obtained by Ding. Additionally, they performed oil pan boilover experiments of diesel and aviation kerosene under low-pressure conditions.…”

Number concentration and size distribution of soot aerosols of heptane fire at low pressures

“…The releasing soot from combustion may result in accidental death. [1][2][3] The burning of biomass and fossil fuels emits substantial amounts of particle matter that impacts on public health, reduces air visibility thereby resulting in accidents and economic losses, and even has a significant impact on global climate change. 4,5 The luminous soot can also enhance the radiation from flames.…”

“…The soot is generated from combustion process which provides the primary sources of energy. The releasing soot from combustion may result in accidental death 1‐3 . The burning of biomass and fossil fuels emits substantial amounts of particle matter that impacts on public health, reduces air visibility thereby resulting in accidents and economic losses, and even has a significant impact on global climate change 4,5 .…”