Acoustic measurements of models of military style supersonic nozzle jets

作     者：Ching-Wen Kuo Jérémy Veltin Dennis K.McLaughlin 

作者机构：Department of Aerospace EngineeringThe Pennsylvania State UniversityUniversity Park TNO Science and Industry 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2014年第27卷第1期

页      面：23-33页

核心收录：

学科分类：082502[工学-航空宇航推进理论与工程] 08[工学] 0802[工学-机械工程] 0825[工学-航空宇航科学与技术] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the sponsorship of the Strategic Environmental Research and Development Program project number WP-1583 

主　　题：Aeroacoustics Acoustic noise measurement Jet noise Jets Nozzle Supersonic flow 

摘      要：Modern military aircraft jet engines are designed with variable-geometry nozzles to provide optimal thrust in different operating conditions, depending on the flight envelope. How- ever, acoustic measurements for such nozzles are scarce, due to the cost involved in making full- scale measurements and the lack of details about the exact geometries of these nozzles. Thus the present effort at Pennsylvania State University （PSU） in partnership with GE Aviation and the NASA Glenn Research Center is aiming to study and characterize the acoustic field produced by supersonic jets issuing from converging-diverging military style nozzles, and to identify and test promising noise reduction techniques. An equally important objective is to develop methodology for using data obtained from small- and moderate-scale experiments to reliably predict the full-scale engine noise. The experimental results presented show reasonable agreement between small-scale and medium-scale jets, as well as between heated jets and heat-simulated ones.