A method for testing and evaluating surface quality of an internal flow channel based on pressure loss
By developing a pressure loss-based method for testing the surface quality of internal flow channels, standard samples were prepared and an evaluation device was designed. The head loss formula was modified, which solved the problem that existing technologies could not non-destructively test the surface roughness of internal flow channels in complex parts, thus achieving non-destructive testing and efficient evaluation.
CN118274752BActive Publication Date: 2026-06-02XI AN JIAOTONG UNIV
Patent Information
- Application Number
- CN202410414578.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2026-06-02
- Estimated Expiration
- 2044-04-08
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Figure CN118274752B_ABST
Abstract
A kind of test and evaluation method of internal flow channel surface quality based on pressure loss, different roughness, corner standard internal flow channel sample is manufactured using the way of additive manufacturing;Then the design and manufacture of internal flow channel surface quality evaluation device are carried out;Again, the coefficient calibration of modified head loss formula is carried out;In the evaluation device, the error equation coefficient between the theoretical head loss value and the experimental head loss value is calibrated using the standard internal flow channel roughness sample with different roughness;The local resistance coefficient in the modified head loss formula is calibrated using the standard internal flow channel corner sample with different corners;Finally, the internal flow channel surface quality test and evaluation of complex parts are carried out;The present application fully considers the influence of roughness in head loss formula and the subsequent use of parts, can realize the nondestructive testing of internal flow channel surface quality of complex parts, is conducive to guarantee the machining quality of internal flow channel of complex parts and perfect internal flow channel surface quality evaluation system.
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Citation Information
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