Method for acquiring migration speed of high-speed jet shear layer based on dynamic pressure data

• Main Authors: LI CONGJIAN, YAN CHUNHUI, JIANG MINGHUA, XIONG NENG, YANG DANGGUO, LIU YANG, ZHOU FANGQI, XU LAIWU, PU QI, YAO DAN, HE FAN, ZENG LIQUAN, NING RONGHUI, DONG BIN, HUANG HAOYU
• Format: Patent
• Language: Chinese; English
• Published: 05.03.2024
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention discloses a method for acquiring the migration velocity of a high-speed jet shear layer based on dynamic pressure data, and relates to the technical field of high-speed wind tunnel tests, which comprises the following steps: in a high-speed free jet wind tunnel test with a stable flow field, measuring the migration velocity of the high-speed jet shear layer by vertically adjusting the spatial positions of a test bracket probe with a pressure sensor and a high-speed jet shear layer area; three groups of dynamic pressure data are collected; based on normalization processing of a cross-correlation function between each group of dynamic pressure data, three time delay values corresponding to the maximum cross-correlation coefficient are extracted; and substituting the three time delay values into a formula to obtain the migration velocity UC of the high-speed jet shear layer. The invention discloses a method for acquiring the migration speed of a high-speed jet flow shear layer based on dynamic pres