点燃式航空活塞发动机汽油-航空煤油燃烧特性

In order to study the combustion characteristics of aviation kerosene in the spark ignition aviation piston engine, an aviation piston engine test rig capable of simultaneously burning gasoline-aviation kerosene was reconstructed. And a three-dimensional simulation model of the engine combustion chamber was established. Using the combination of test and three-dimensional simulation, the difference of combustion characteristics between gasoline and aviation kerosene was studied. The result showed that under the condition of low speed and small load, the indicated mean effective pressure (IMEP) was less than 0.5MPa; by adjusting the operating parameters such as ignition timing, the aviation kerosene can reach the combustion characteristics similar to gasoline; as the engine speed and load increased, the aviation kerosene combustion characteristics presented the extended flame retardation, the increased combustion duration, the reduced maximum pressure, and the burning center of gravity moved backward, accompanied by obvious knocking. Under high speed conditions, aviation kerosene combustion was affected by knocking, and the load can only be increased to 21%.