Development and application of the method for positioning drainage devices in the head fairing

Authors

DOI:

https://doi.org/10.15587/1729-4061.2017.108450

Keywords:

power-to-weight ratio, dynamic factor, pressure gradient, transonic zone, drainage devices

Abstract

It is important to minimize the maximum possible pressure gradients in the location of the spacecraft placement. A new engineering method was proposed for an operational estimation of the absolute pressure and its gradient on the outer surface of the cone-cylinder assembly and in the transonic flow around it. The essence of the method lies in the possibility of analyzing dynamics of pressure thru the dynamic factor. This makes it possible to carry out analysis for carrier rockets with various power-to-weight ratios which affects the speed of passing the transonic section. Application of this method enables choosing of locations for installation of drainage devices taking into account minimization of the pressure gradient in the zone of the spacecraft placement. This method, unlike the existing ones, features its independence from the necessity of ballistic calculations. The mathematical model of this method is based on the use of the starting power-to-weight ratio of the carrier rocket. It is defined as the ratio of the carrier rocket weight to the thrust of its engines at the moment of its detachment from the launching table. The boundary conditions for application of the mathematical model were given. The possibility of linear interpolation between all coefficients of the mathematical model was taken into account. The developed method is based on experimental data and can be used for other types of the head fairing assemblies. The method is also intended for design and engineering works.

Author Biographies

Sergey Davydov, Oles Honchar Dnipro National University Gagarina ave., 72, Dnipro, Ukraine, 49010

Doctor of Technical Sciences, Professor

Department of design and construction

Pavel Semenenko, Yuzhnoye SDO Kryvorizka str., 3, Dnipro, Ukraine, 49010

Engineer 

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Published

2017-08-22

How to Cite

Davydov, S., & Semenenko, P. (2017). Development and application of the method for positioning drainage devices in the head fairing. Eastern-European Journal of Enterprise Technologies, 4(7 (88), 17–24. https://doi.org/10.15587/1729-4061.2017.108450

Issue

Vol. 4 No. 7 (88) (2017): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2017 Sergey Davydov, Pavel Semenenko

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