## Abstract

We have experimentally and numerically studied the influence of the ratio of the diameter of a cylinder with a frontal gas-permeable porous insert made of nickel sponge to the average pore diameter in the insert on the aerodynamic drag of this model body in supersonic airflow (M_{∞} = 4.85, 7, and 21). The analytical dependence of the normalized drag coefficient on a parameter involving the Mach number and the ratio of cylinder radius to average pore radius in the insert is obtained. It is suggested to use this parameter as a similarity criterion in the problem of supersonic airflow past a cylinder with a frontal high-porosity cellular insert.

Original language | English |
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Pages (from-to) | 225-228 |

Number of pages | 4 |

Journal | Technical Physics Letters |

Volume | 44 |

Issue number | 3 |

DOIs | |

Publication status | Published - 1 Mar 2018 |

## Keywords

- POROUS-INSERT
- DRAG