Uncertainty in airflow field parameters in a study of shock waves on flat plate in transonic wind tunnel

2013 Joint IMEKO (International Measurement Confederation) TC1-TC7-TC13 Symposium: Measurement Across Physical and Behavioural Sciences

Reis, M.L.C.C.^1,2 ; Filho, J. B. P. Falcao^1 ; Araújo, M.C.C.^2

Institute of Aeronautics and Space, 50 Praça Mal. Eduardo Gomes, CEP 12228-904, São José dos Campos, SP, Brazil^1

University of Taubate, Av. 9 de Julho 199, CEP 12020-200 Taubate, SP, Brazil^2

关键词: Air flow fields;    Drag and lift forces;    Expansion wave;    Plate surfaces;    Pressure values;    Theoretical values;    Transonic wind tunnels;    Wind tunnel tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/459/1/012034/pdf
DOI  :  10.1088/1742-6596/459/1/012034

来源: IOP

【 摘 要 】

When flat plates are submitted to wind tunnel tests and the upstream Mach number is greater than 1.0 this gives rise to shock and expansion waves. This study experimentally evaluates the airflow field parameters ahead of and behind the shock region and compares the data obtained in the tests with the expected theoretical results. For the case of expansion waves only theoretical values are supplied in this preliminary part of the study. The drag and lift forces acting on the model being tested are also estimated from the pressure values measured on the plate surface. Data reduction includes evaluation of the uncertainties associated with the measured quantities, as well as their propagation to the output quantities, employing the Monte Carlo method. Numerical simulation of the phenomena using Computational Fluid Dynamics is also done. Data obtained analytically, experimentally and numerically are compared.