CONTENTS #6 (June) 2019
Ryuvok Space Transportation System for Missions to the Moon Using Hybrid Deceleration Scenarioя (p. 7 – 15)
This article offers possible ways of development of the moon using the existing for today in the Russian space launch vehicles (LV) prior to operation of LV the super heavy class. The paper suggests a Space Transportation System (STS) for regular flights of a reusable crew vehicle (RCV) between the Earth Orbital Station (OS), for example, ISS, and a cislunar orbital station. When implementing such a STS, it is possible to use existing upper stages DM and Fregat, which are delivered into orbit by the LV with a carrying capacity of about 25 t. Main challenge for the STS implementation is the RCV deceleration down to the orbital velocity of the OS after the flight from the Moon to the Earth. The paper presents various schemes for solving this problem. It is shown that the TS “Ryuvok” with a “hybrid” braking scheme requires the smallest number of existing LVs and upper stages for flights to a cislunar orbital station, and from the newly developed means it is necessary to create an RCV and a space vehicle as a tanker for its refueling.
Keywords: space transportation system; orbital station; cislunar orbital station; reusable crew vehicle.
Designing Large-Sized Dimensionally-Stable Spacecraft Constructions Considering Scale Factor
(p. 16 – 22)
V.A. Komarov, O.G. Zhidkova
Reviewed the tasks related to creation of precision spacecraft constructions. Space telescopes were chosen as an object of study. Analysis of the main geometry variables for existing and developing large-sized structures is conducted. The paper considers the effect of varying absolute dimensions of structural body on the weight, loads, strength and stiffness characteristics. The necessity of taking into account scale factor in creation of advanced spacecraft constructions is shown. The article demonstrates the actuality of composites application and discusses the means of thermal and dimensional stability securing. Examples of hull composite structures of space telescopes are given.
Keywords: dimensionally stable constructions; space telescope; weight; loads; strength; stiffnes; scale factor; composites.
Analytical Review of the Spacecrafts for Moon Surface Exploration (p. 23 – 32)
Yu.A. Matveev, V.K. Sysoev, A.S. Feofanov
An analytical review of past and future automatic spacecraft to study the Moon surface is made in this article. The issues of the flight to the Moon, descent from orbit and landing, the periods of active existence of the station, options of providing the spacecraft of electric power and landing accuracy are considered in detail. The dependences of the main characteristics on the spacecraft total mass are presented. The analysis on the main trends in the development of modern and future spacecraft is made.
Keywords: pole; moon base; spacecraft; landing module; landing accuracy.
Numerical Simulation of Aerodynamic Characteristics of the Savonius Wind Wheel Group Taking into Account Their Interference (p. 33 – 39)
V.S. Glazkov, Yu.M. Ignatkin
The study presents the results of calculations of aerodynamic characteristics of the combination of Savonius S-type rotors, taking into account their interference, performed by numerical simulation of hydrodynamic processes CFD in the ANSYS Fluent software package. The calculations for the main schemes of mutual placement of rotors in the wind farm – «bearing» and «tandem» are made. The influence of the direction of rotation of wind wheels on the efficiency of the group consisting of two wind turbines with different distances between them is estimated. Recommendations on the optimal placement of windmills in terms of the compactness of the wind farm with minimizing the negative impact on the aerodynamic characteristics of individual windmills are developed. An estimated calculation of the size of a group of five wind turbines with a total power of РΣ = 12 kW was made taking into account all the identified dependencies.
Keywords: savonius rotor; CFD-method; aerodynamic characteristics; interference; wind farm.
Application of Counter-Rotating Turbines in Aviation Gas-Turbine Engines Design (p. 40 – 47)
A.E. Remizov, O.O. Karelin
Design and parameters of counter-rotating turbines of aviation gas-turbine engines are considers. The paper reviews native and foreign works in counter-rotating turbines for perspective aviation gas-turbine engines.
Keywords: gas-turbine engine; turbofan engine; counter-rotating turbine.
Modern Methods of Investigation of Acoustic Situation in Cabs of Aircraft
(p. 48 – 54)
V.V. Penchuchenko, V.V. Kharitonov, R.R. Klenkov, A.A. Mishchenko
The characteristics of the main factors influencing the acoustic situation in the workplace of the flight crew are given, and the results of the analysis of modern methods for studying the acoustic environment in the cockpits of civil and state aircraft used in their tests are presented.
Keywords: acoustic situation; aircraft noise; acoustic safety; aircraft tests; aircraft cabin.