关键词: 喷气发动机;地面试车台;流量测量;推力测量;气封

Abstract: Many factors such as measurement of air flow rate, oxygen supplement and thrust measurement should be taken into account of connection models of tested engine inlet. At high simulated total temperature the connection model for flow measurement of sonic nozzle should be carefully selected, otherwise the temperature will seriously effect measurement accuracy. A zigzag sealing model is accepted, where inlet and exit pressures can be measured to meet the requirements for thurst measurement and oxygen supplement. Based on the pressures measured, the leaked air flow through the sealing model will be theoritically calculated, which will more accurately modify the oxygen supplement and measured thrust.

Key words: Jet engine;Ground test stand;Flow rate measurement;Thrust measurement;Gas sealing