【title】：Enhanced mixing in a simulated combustor using synthetic jet actuatorsEnhanced mixing in a simulated combustor using synthetic jet actuators
【作者】：Chen, Y.^Liang, S.^Aung, K.^Glezer, A.^Jagoda, J. (Georgia Inst. of Technology, Atlanta)
【Corportate Author】：【Catalog】：7507 Aircraft Propulsion & Power (1975-)|【Keywords】：ACTUATORS; JET MIXING FLOW; FUEL-AIR MIXING; COMBUSTION CHAMBERS; GAS TURBINE ENGINES; ACTIVE CONTROL; VELOCITY MEASUREMENT; CROSS FLOW; DILUTION; TEMPERATURE MEASUREMENT【Publish Year】：
【Language】：English【Record id】：99-0449【File Size】：875K
【Come From】：AIAA, Aerospace Sciences Meeting and Exhibit, 37th, Reno, NV, Jan. 11-14, 1999, 13 p..【AAIA ID】：A9916337
【Abstract】：Mixing in a turbine engine combustor significantly influences fuel efficiency, performance and lifetime of the engine, and pollutant emissions such as NO(x). ^Thus, various passive and active control techniques have been used to control and improve mixing processes in the combustor. ^We demonstrate the use of a novel active control technology, synthetic jets, to enhance mixing in a facility simulating the dilution zone in a typical gas turbine combustor. ^Synthetic jets are jets synthesized from the surrounding fluid using zero-mass-flux actuators. ^They can improve momentum transfer without requiring the introduction of additional fluid. ^Dilution zone conditions were simulated by using two streams of hot and cold temperatures. ^Mixing between the streams was determined by measuring temperature distributions downstream of synthetic jets. ^This could be enhanced to differing degrees by varying the mean velocity of synthetic jets. ^However, there appears an upper limit in the actuation of synthetic jets beyond which the improvement in mixing is marginal. ^Velocity measurements suggest that the wake structure from the bluff body formed by interactions between synthetic jets and crossflow is responsible for improved mixing. ^Synthetic jet technology may be ideal for improving dilution zone mixing in a turbine engine combustor without using additional cold dilution air. ^(Author)
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