关键词: 涡轮喷气发动机;高空模拟试车台;高空模拟试验

Abstract: The simulating test technology of the exhaustion ambient pressure ofthe turbojet in some altitude simulating chamber is emphatically described, and themeasures to increase simulated altitudes such as appropriately using tail cabin, exhaust diffuser and ejector; choosing the quantity of water jected and cooling air; applying choking technique and improving the air-tightnelss in the cabin are also discussed in details.The simulating test technology of exhaustion ambient pressure has been applied to 600 tests for a turbojet of aircraft at high altitude conditions in some altitude simulating cabin, it is satisfied with requirements for tests of turbojet.

Key words: Turbojet engine;Altitude simulated test cell;Altitude simulation test