Mach number sensitivity analysis method for supersonic cavity flow

A technique of sensitivity analysis and Mach number, applied in the field of experimental fluid mechanics, which can solve problems such as inability to continuously change
CN106644362AActive Publication Date: 2017-05-10INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
7 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
Publication Date
2017-05-10

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a Mach number sensitivity analysis method for supersonic cavity flow, and the method comprises the steps: forming expansion waves at different angles at the front edge of a flat plate through adjusting the attack angle of a model, wherein the Mach number will rise after a gas flow passes through the expansion waves; and carrying out the sensitivity analysis of the Mach number through the comparison of the pulsating pressure data before and after the change of the attack angle. The method can achieve the Mach number sensitivity analysis under the supersonic conditions, and solves a key problem of a wind tunnel sensitivity analysis test.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of experimental fluid mechanics, in particular to a Mach number sensitivity analysis method suitable for supersonic cavity flow. Background technique

[0002] With the independent innovation and development of my country's weapons and equipment, more and more unconventional aerodynamic layouts have been applied to advanced fighters. However, while the new aerodynamic layout scheme improves the agility and stealth effect of the aircraft, it also brings many new problems, such as vortex breakage during flight at high angles of attack, resulting in buffeting of the vertical tail, and the severe pressure generated when the internal weapon compartment is opened. pulsation etc. One of the consequences of these problems is that under the action of severe dynamic loads, cracks on the skin of the vertical tail and the thin-walled structure of the embedded weapon compartment accelerate to form and expand, which seriously threa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More