[en] This paper presents the experimental characterization of the recently commissioned Mach~14 hypersonic nozzle of the Longshot gun tunnel.
The Longshot facility of the von Karman Institute for Fluid Dynamics is a short-duration hypersonic wind tunnel, which is capable of reproducing the high Mach and Reynolds numbers experienced during most atmospheric re-entries.
The free-stream flow conditions were measured at several stream-wise locations with a sting-supported arrangement of a pitot rake, a reference total pressure probe, a static pressure probe, a heat-flux probe, and an acoustic probe.
The flow characteristics were inferred from the free-stream measurements using an elaborated rebuilding technique.
The investigations cover the assessment of: flow uniformity in terms of Pitot pressure, tunnel noise level, core flow diameter, and useful test time.
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