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Practical Recognition Algorithm of Turbulence Integral Scale and Its Numerical Validation(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2012年04期
Page:
67-73
Research Field:
Publishing date:

Info

Title:
Practical Recognition Algorithm of Turbulence Integral Scale and Its Numerical Validation
Author(s):
WANG Feng-feng;  ZHAO Lin;  CAO Shu-yang;  GE Yao-jun
State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
Keywords:
turbulence integral scale;  Taylor assumption;  harmonic synthesis method;  recognition algorithm
PACS:
TU279.7
DOI:
-
Abstract:
Through the comparison of multiple algorithms of turbulence integral scale, the correctional recognition algorithm based on Taylor assumption was proposed. The harmonic synthesis method was used to generate several broadband time-series based on Von-Karman spectrum and several single-frequency time-series. Through the turbulence integral scale calculation of these signals using the correctional algorithm, the recognition results were compared with the expected theoretical values and the correctness of the algorithm was validated. The correction factor obtained for the broadband turbulence was 2/3, and for the narrowband turbulence was 6. The results show that this method greatly improves the calculation accuracy of the turbulence integral scale, which has a good value in engineering application.

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Last Update: 2012-12-20