Abstract

In order to achieve highly accurate wind tunnel testing, a sophisticated method for wall and support correction is necessary. We simulated the ONERA-M5 model installed in the JAXA 2m2m Transonic Wind Tunnel (JTWT) considering the wall and support devices to investigate their interferences. The porous wall at the test section is also considered with a new model developed. The pressure on the porous wall is compared with the measurement. The results obtained from the simulation agree with the measurements. The features of wind tunnel flow including the porous wall flow were revealed from the simulation. The computed force and moment move closer to measurements, when the support and wall are considered and sufficient grid resolution is employed. Comparing the results, we calculated the support and wall interferences for CL, CD, and Cm. The CD is the most affected by the support and wall. Especially, the support interference is large for this model and support devices. The wall interference is +5counts, the support interference is -28counts, and the total interference is +23counts. In addition, we clarified the components affected by the support and wall for CL, CD, and Cm. As for the CD, the support affects all components, whereas the wall affects mostly main wing.

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