News

Information on the results of NASU and SSAU activities in 2017

The efficiency of the concept use of an artificial mini-magnetosphere to control the motion of spacecraft with a self magnetic field in the Earth's ionosphere and in interplanetary space has been experimentally substantiated at the plasmodynamic stand of the ITM of the NASU and the SSAU, which has the status of the "national achievement of Ukraine". Artificial mini-magnetosphere allows to apply modes of braking or acceleration of spacecraft: to increase the resistance (or thrust) force by 3 to 4 times in comparison with the "unmagnetized" spacecraft (an empty artificial mini-magnetosphere).

The injection of plasma into the cavern of an artificial mini-magnetosphere allows us to increase the resistance (or thrust) force by 2-3 times compared to an empty magnetosphere (a mini magnetosphere is filled). In general, the use of an artificial mini-magnetosphere allows us to increase the resistance force (or thrust )of spacecraft in 7 - 10 times compared with the "unmagnetized" spacecraft.

Slide 1

A set of mathematical models describing the dynamic processes of launching a marching rocket engine for medium and heavy carrier rockets has been developed. The set includes mathematical models of work processes in the elements of the propulsion system at launch, in particular:
- non-stationary flow of liquid in the oxidant and fuel lines;
- non-stationary heat exchange in the engine power supply system with liquid oxygen;
- dynamic processes in oxidizer and fuel pumps, taking into account cavitation in pumps;
- the process of injecting gaseous oxygen into the liquid oxygen stream behind the booster pump of the oxidant;
- low-frequency dynamic processes in the elements of the gas path (gas generator, gas pipe and combustion chamber);
- dynamic processes in the main and booster turbo-pump units and in the flow regulator.

Slide 2

It is indicated that cavitation phenomena in oxidizer and fuel pumps have a significant influence on the transient processes of engine start, especially at minimum pressures and maximum temperatures of fuel components at the engine inlet.

Slide 3

Information on the results of NASU and SSAU activities in 2016

To improve the efficiency of magnetohydrodynamic systems application, for example, by increasing the Lorentz force, in controlling spacecraft that move in the ionosphere of the Earth and in interplanetary space, a technique and procedure has been developed for the synthesis of artificial plasma formations with an increased concentration of charged particles by 2 to 2.5 times at the solid body surface. The structure of the distribution of charged particles in an artificial plasma formation is similar to the structure of the stream-exhausts of the onboard jet engines of the spacecraft. It is shown that magnetohydrodynamic systems with artificial plasma formations can be the basis for new promising means of spacecraft control.

On 16/12/2015 from the Sriharikota launch site (India) the Singapore satellite TeLEOS 1 was successfully launched, the control system of which is equipped with four jet Hall-type engines, which have been developed, manufactured and tested on a vibration bench and plasmodynamic bench at the ITM NASU and SSAU. The creation of a new jet engine is a vivid example of the creative cooperation of the Institute of Technical Mechanics scientists of the National Academy of Sciences of Ukraine, Oles Honchar Dnipropetrovsk National University, and the National Technical University "Kyiv Polytechnic Institute".(Slide 1).

Slide 1

A mathematical model, an algorithm and a program has been developed for the numerical calculation of the supersonic jet combustion products parameters of the rocket engine fuel, taking into account the water supply to the body stream. The main regularities of the effect of water supply, mixing and burning of combustion products in air oxygen on the flow structure, thermogasdynamic and thermophysical parameters of the stream have been established. The use of the developed software and methodological support in Yuzhnoye Design Bureau to design project calculations makes it possible to reduce the amount of time and financial expenses for experimental research of aerospace equipment. (Slide 2).

Slide 2

Based on the analysis of the ground complex structures and the development of the fundamentals for the loads and strength calculations, gas-dynamic and temperature effects in the preparation and carrying out of space launches, the first draft of the strength standards for the launch equipment structures of aerospace complexes has been created (Figures 1, 2). The classification of aerospace complex launch equipment has been substantiated when creating strength standards on the basis of system analysis using the hierarchical method. Loads that arise during operation (launch preparation and launch vehicles start) has been forecast. The obtained results are used for the further development of the space industry in Ukraine. (Slide 3).

Slide 3

Information on the results of NASU and SSAU activities in 2015

Methodological fundamentals of fine-particle media production by cavitation pulse processing of different materials were developed, the mathematical model was constructed, design parameters were calculated, cavitation pulse installation (plant) was produced, the tests of which confirmed its high efficiency. Three new cavitation pulse dispersants of the same type but different design parameters were integrated into cavitation pulse installation (plant). This allows modes change of cavitation pulse processing of the solid phase in a two-phase fluid media flow through concurrent dispersants number change, their sequence and the inlet pressure (slide).

Slide

Information on the results of NASU and SSAU activities in 2009-2014

In terms of physical and chemical modeling of spacecraft (SC) and the Earth's ionosphere interaction at the plasmodynamic stand, which is a national treasure, the synergistic effect of atomic oxygen streams and ultraviolet radiation of the solar spectrum on the accelerated degradation of spacecraft's polymeric materials was discovered. It is indicated that when operating spacecraft for over two years at altitudes above 400 km, the degradation rate of geometric, weight and thermo-optical polymer characteristics increases several times and, as a result, spacecraft service life is reduced. The dependencies that can predict polymer properties' changes in orbit were obtained (Slide 1).

Slide 1

In terms of physical modeling of interaction between "spacecraft - plasma" and spacecraft motion in the Earth's ionosphere at altitudes from 800 to 1000 km and in interplanetary space Coulomb and magnetic components of power resistance coefficients and "magnetized" sphere lift force in the hypersonic rarefied plasma flow were defined. It is indicated that self-magnetic field vector rotation relative to plasma flow velocity vector allows the dynamic interaction mode realization in the system "spacecraft - plasma" with a non-zero aerodynamic efficiency, as well as modes of effective braking and acceleration of spacecraft in terms of "magnetic sail" motion in ionospheric plasma and in solar wind plasma (Slide 2).

Slide 2

The Institute is the leader in Ukraine and abroad on theoretical studies to address the problem of providing longitudinal stability of multi-stage liquid launch vehicles. In 2009-2014 the theoretical analysis of the dynamic properties of first-stage liquid rocket power plant and the design of launch vehicle body "Antares" developed by the order of Orbital Sciences Corporation (the U.S.A.), was fulfilled; the theoretical study of the new liquid launch vehicle longitudinal stability during the active part of its flight was conducted; the theoretical prediction of the new multi-stage liquid launch vehicle "KSLV-II" longitudinal stability was made. A number of recommendations to address the problem of providing longitudinal stability of these rockets was developed.

Slide 3

The design was developed and a series of seat suspensions for multi-purpose vehicle drivers was manufactured. Experimental studies of these suspensions were conducted, and the results were obtained that the proposed new pneumatic suspension design on its dynamic properties exceed the best, most complex, pneumatic suspensions of world famous brands such as Sears Seats (the USA) Grammer (Germany) both with passive, semi-active, and active vibration protection system. Prototypes of seats with vibration protection system installed were introduced to the State Enterprise "PA" UMZ " (slides 3, 4).

Slide 4

The ITM of NASU and NSAU developed scientific and methodological support, which has no similarities in Ukraine, for complex problem solution of compressor gratings aerodynamic design. The scientific and methodical support and software for parameter calculation of spatial transonic turbulent air flow in the compressor stages of aircraft gas turbine engines, software, and methodological support for blade rows aerodynamic optimization were developed. These developments are used by one of the world's leading aviation engines developers, "Ivchenko-Progress" Enterprise in blade row compressor design for gas turbine engines. In particular, guiding device grid of last stage axial compressor of ground gas compressor installation was designed (Slide 5).

Slide 5

In order to update the fleet of railway wagons on the railways of Ukraine, the implementation of standard freight car truck complex modernization suggested by the ITM of NASU and NSAU is continued, which allows the improvement of dynamic characteristics performance, road safety and reduction of wheel and rail wear. This said, the car value will increase by only 2-3%, and the service life of details which wear the most, increases several times, the individual components - more than 10 times. Currently, the railways of Ukraine are already operating more than 23 000 gondola cars with upgraded trucks (about 33% of the gondola park). According to Ukrainian technology, truck freight cars were also modernized on the railways of Belarus (1000 cars), Kazakhstan (500 cars) and Russia (200 cars) (slide 6).

Slide 6

In terms of scientific and technological EU program titled "7th Framework Programme", the Institute performs LEOSWEEP project in which the following companies participate: Engineering and Construction Company (SENER Ingenieria y Sistemas, Spain), Polytechnic University of Madrid (Spain), TransMIT Gesellschaft fuer Technologietransfer mbH (Germany) , German aerospace center (Germany), University of Southampton (UK), the National Centre for scientific research (France), private Portuguese aerospace company "DEIMOS ENGENHARIA SA" (Portugal). The LEOSWEEP project is aimed to create conditions for the near future work on a large-scale removal of debris with the help of technology that uses an ion beam to create braking forces for the subsequent removal of space debris from the orbit (Slide 7).

Slide 7

© 2001 - 2017 The Institute of Technical Mechanics of NASU and SSAU