Abstract
Combustion tests of pre-mixture of methane and air in constant volume combustion chamber (CVCC) have been carried out by means of flame propagation photo and gas pressure measurement, the effects of CVCC body temperature, intake pressure of pre-mixture of methane and air, equivalence ratio and location of the built-in adaptor have been investigated. The whole combustion chamber can be divided into two parts, i.e. the upper combustion chamber and the lower combustion chamber, by the built-in adaptor with through hole. Owing to the built-in adaptor with through hole, jet ignition or compression ignition (auto-ignition) phenomena may occur in the lower combustion chamber, which is helpful to getting higher flame propagation velocity, higher combustion peak pressure, low cycle-to-cycle variation and more stable combustion process.
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