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- W4379780219 abstract "The highly unsteady flowfield produced by impinging jets can result in loud noise and potentially harmful structural vibration in Short Take-Off and Vertical Landing applications. In the present study, a microjet-based control method is implemented on a Mach 1.5 supersonic nozzle to attenuate jet shear layer unsteadiness. Two microjet arrays are installed near the nozzle exit and the diverging section of the supersonic nozzle. Each microjet array consists of sixteen individually addressable microjets controlled by solenoid valves. Two electronic pressure regulators are used to adjust the supply pressure for each microjet array. A genetic algorithm is applied to optimize the microjet configuration to minimize overall sound pressure level. An optimization using a genetic algorithm is performed at a selected impingement distance (H/D = 3.75). The genetic algorithm solution reduced OASPL by 10 dB compared to the baseline condition, which is about 2 dB better than the microjet configuration where all microjets are fired with maximum pressure — this further noise reduction is achieved while reducing 26% of microjet mass flow rate. The optimal GA solution is applied to a range of impingement distances (0.75D – 10D), and it is revealed that this GA solution effectively reduces noise for the majority of impingement distances." @default.
- W4379780219 created "2023-06-09" @default.
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- W4379780219 date "2023-06-08" @default.
- W4379780219 modified "2023-09-23" @default.
- W4379780219 title "Optimization of Microjet Control for Supersonic Impinging Jet Using Genetic Algorithm" @default.
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- W4379780219 doi "https://doi.org/10.2514/6.2023-3354" @default.
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