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- Article name
- Estimate of variance of derivatives of an aerodynamic drag coefficient with respect to attack and yaw angles of a rotary body with small irregular surface distortions of a composite thermal protection coating at supersonic flow
- Authors
- SHVALEVA R. K., , src@makeyev.ru, Joint Stock Company "Academician V. P. Makeyev State Rocket Center"; South Ural Scientific Centre, Miass, Chelyabinsk Region, Russia
KALASHNIKOV S. T., , ofpat@mail.ru, South Urals Federal Research Center of Mineralogy and Geoecology UB of the RAS, Miass, Chelyabinsk Region, Russia
MOKIN Yu. A., , ofpat@mail.ru, South Urals Federal Research Centre of Mineralogy and Geoecology of the UB RAS, Miass, Chelyabinsk Region, Russia
- Keywords
- supersonic flow / rotary body / aerodynamic drag coefficient / sharp cone / composite thermal protection material / small irregular surface distortion / small attack angle
- Year
- 2023 Issue 4 Pages 28 - 33
- Code EDN
- BLKBFX
- Code DOI
- 10.52190/2073-2562_2023_4_28
- Abstract
- The article is devoted to one of acute issues of definition of aerodynamic coefficients of high-speed re-entry vehicles (RVs) of the rotary-body shape with small irregular surface distortions of a composite thermal protection coating, i.e. an issue of assessment of a scale of variance of derivatives of an aerodynamic drag coefficient D{cxα}, D{cxβ} with respect to attack and yaw angles versus governing parameters in the vicinity to zero spacial attack angle. An analytical integral solution of a set modeled problem for a rotary body with a given autocorrelated function of irregular distortions of its surface is obtained on the basis of Fourier expansion of the surface distortion and a method of differential locality hypothesis used to evaluate pressure variations. Curves of practically ultimate values cxα, cxβ at 3σ{cxα} versus a degree of correlation dependence for modeled autocorrelated functions of irregular surface distortions of a sharp 30о-cone flown around at М¥ @ 10 are provided. The obtained curves are qualitatively analyzed.
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