
Fluctuating pressure measurements at M = 5.0 are presented for turned (axisymmetric) nose shapes that represent approximations of cross sections (at various meridians) of the recovered graphite nosetip of the Nosetip Recovery Vehicle (NRV). Selected fluctuating pressure measurements are also presented for a replica of the NRV nosetip and a replica of a wind tunnel ablated camphor nosetip that roughly resembles the NRV nosetip. The greatest fluctuating pressures occurred under imbedded shock waves and/or the reattachment shock waves of imbedded regions of separated flow. The non-dimensionalized power spectra under the reattachment shocks are in good agreement with similar measurements for spiked cones and a drag-reduction spike. Evidence of a Reynolds number sensitive resonant peak was observed in the spectra under reattachment on the NRV nose due to surface irregularities.
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