Experimental research on air/ethanol mono-injector gas generator

Abstract

A dual orifice gas generator project based on aero-engine combustor was proposed. A set of mono-injector gas generator was designed and manufactured. Hot firing tests were conducted under different conditions to verify the performance of the gas generator, and researches on the working pattern of ethanol supply system, lean blowout limits tests and system sequence optimization were carried out. The test results show that the technical design scheme of the generator is feasible, the mass flow rate, temperature and pressure all meet the design target. The smooth ignition curve indicates a reliable ignition of the generator and steady performance of combustion, and the gas generator is characterized by advantages of step-start; through optimizing the ethanol supply sequence, the problem about impact effect of supply pipeline caused by valve work sequence is resolved, and combing with air pressure regulation optimization, the start-up time of gas generator is greatly shortened; the gas generator has a large lean blowout limits, and is able to work steadily under a wide working range.