Parameters at different sections of some home made gas generator were measured with a technical nozzle to simulate the flow capacity of a power turbine.The data indicates that the performance of the gas generator can reach the design goal.During the ground test under different working conditions of the gas generator
the influences of the radial clearance and exhaust nozzle area were studied.This provides a technical support for improving performance of the gas generator and the matching of the power turbine with the whole engine.