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    Effect of Contraction on Turbulence and Temperature Fluctuations Generated by a Warm Grid (1959)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: Hot-wire anemometer measurements were made of several statistical properties of approximately homogeneous and isotropic fields of turbulence and temperature fluctuations generated by a warm grid in a uniform airstream sent through a 4-to-1 contraction. These measurements were made both in the contraction and in the axisymmetric domain farther downstream. In addition to confirming the well-known turbulence anisotropy induced by strain, the data show effects on the skewnesses of both longitudinal velocity fluctuation (which has zero skewness in isotropic turbulence) and its derivative. The concomitant anisotropy in the temperature field accelerates the decay of temperature fluctuations.
    Keywords: Fluid Mechanics and Heat Transfer
    Type: NASA-MEMO-5-5-59W
    Format: application/pdf
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