Distortion velocity field inversion method and system considering distortion factor

By arranging ultrasonic transducers in the air intake, calculating the distortion factor and re-dividing the measurement area, and combining weighted calculation with the least squares method to solve the velocity field, the problem of insufficient reconstruction accuracy of complex distorted flow fields is solved, and high-precision flow field measurement is achieved.

CN121384385AActive Publication Date: 2026-01-23BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
8 Cites 0 Cited by

Patent Information

Application Number
CN202511673466.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-14
Publication Date
2026-01-23
Estimated Expiration
2045-11-14

AI Technical Summary

Technical Problem

Existing technologies lack the accuracy and specificity for reconstructing velocity fields in complex and severely distorted flow field measurements, especially in aircraft air intakes, where the single-level classification of distortion limits the measurement capabilities.

Method used

The distortion velocity field inversion method is adopted. By arranging ultrasonic transducers in the air intake, the distortion factor is calculated, the measurement area is re-divided, and a weight matrix is ​​introduced for weighting. The velocity field is solved by the least squares method.

Benefits of technology

It improves the accuracy and specificity of inlet flow field measurement, reduces singular and edge effects, and significantly enhances the reconstruction accuracy of complex distorted flow fields.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a distortion velocity field inversion method and system considering a distortion factor, and belongs to the technical field of non-contact flow field measurement. The inversion method comprises the following steps: determining a corresponding average speed according to the flying time and the path length of each sound wave path; defining the average speed meeting a preset condition as a standard speed; determining a distortion degree factor according to a deviation absolute value of the average speed and a standard speed; redividing a basic measurement area of the section of the air inlet channel based on the distortion degree factor; and solving the average speed of the re-divided region and reconstructing an air inlet speed field. According to the invention, the pertinence, accuracy and stability of air inlet channel measurement can be obviously improved.
Need to check novelty before this filing date? Find Prior Art