Question: A Subsonic open-circuit wind tunnel runs with a test section speed of 40 m/s. The temperature of the lab environment is 160C. If the turbulent

A Subsonic open-circuit wind tunnel runs with a test section speed of 40 m/s. The temperature of the lab environment is 160C. If the turbulent sphere measures the turbulent factor TF (defined as the ratio of theoretical critical Reynolds number for the sphere to the actual critical Reynolds number) of the tunnel as 1.2, determine the sphere diameter. Assume the test section pressure as the standard sea-level pressure.

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