Vitaliy A. Bershadskyi, B. Sokolov, Evgeny N. Tumanin
{"title":"A method for verifying the model of tank operational pressurization process during development of propellant supply system in liquid rocket engines of launch vehicle propulsion systems","authors":"Vitaliy A. Bershadskyi, B. Sokolov, Evgeny N. Tumanin","doi":"10.33950/spacetech-2308-7625-2022-1-56-69","DOIUrl":"https://doi.org/10.33950/spacetech-2308-7625-2022-1-56-69","url":null,"abstract":"During development of propulsion systems for launch vehicles, in order to verify the design results, standalone developmental tests of propellant supply system components were run in specially designed test setups outfitted with the required instrumentation.\u0000As an example of such work, this paper describes the experience of standalone developmental testing of operational pressurization of propellant tanks. During tests in the constructed test setups, heat and mass exchange processes were tried out with simulation of design modes of operational pressurization of propellant tanks filled with oxygen and hydrogen.\u0000 As a result of these tests, a rationale was provided for selection of working mediums as the pressurization gas, design and characteristics of gas injection into propellant tanks, a method for evaluating the efficiency of the pressurization process. Empirical dependences were obtained that were used as the boundary conditions in the models for practical calculations for refining the modes and evaluating the efficiency of the propellant supply subsystem of propulsion systems.\u0000The paper calls attention to the need to use for the purpose of development of the propellant supply systems that involves computer simulations the results of such earlier work when designing advanced rocket propulsion systems.\u0000\u0000Key words: propulsion system, propellant supply system, development of pressurization process, test setup, pressurization gas, propellant components, heat and mass transfer intensity, process efficiency, liquid surface sloshing, computer simulations.","PeriodicalId":384878,"journal":{"name":"Space engineering and technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116646099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Olga K. Zhigastova, Andrey V. Smolokovskiy, S. B. Usikov
{"title":"Method for calculating the duration of communication sessions with a spacecraft under constraints of the communications coverage of the command and tracking station","authors":"Olga K. Zhigastova, Andrey V. Smolokovskiy, S. B. Usikov","doi":"10.33950/spacetech-2308-7625-2022-1-96-108","DOIUrl":"https://doi.org/10.33950/spacetech-2308-7625-2022-1-96-108","url":null,"abstract":"Consideration is given to a method for calculating the duration of communication sessions of the command and tracking station with a spacecraft, which enables to make an efficient use of the session time when planning control operations in order to avoid their premature performance or contingency termination in the event of constraints in the ground site coverage. Thanks to the developed method, it was possible to identify communication coverage with limited radio visibility and exclude the times of constraints from the total session duration providing a zone of stable radio exchange with SC while performing control operations, thereby increasing reliability of their performance in the communication session. The method was successfully applied in control of the Resurs-P SC constellation, where it demonstrated its capabilities and efficiency. It can be used to control other advanced SC.\u0000Key words: spacecraft, ground control complex, flight planning, session control operations, spacecraft motion model, numerical integration method.","PeriodicalId":384878,"journal":{"name":"Space engineering and technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130688581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An analytical method for the dynamic response prediction and produced test modes generated by vibro-shock test benches","authors":"Ilya S. Komarov, Valery Feldshteyn","doi":"10.33950/spacetech-2308-7625-2022-1-46-55","DOIUrl":"https://doi.org/10.33950/spacetech-2308-7625-2022-1-46-55","url":null,"abstract":"This article describes a methodology for the computational forecasting of dynamic characteristics and test modes, implemented by vibro-shock stands of explosive action. Vibro-shock stands are widely used in ground-based experimental testing of onboard equipment of spacecraft for non-stationary broadband impact arising from the operation of pyrotechnic separation means. The principle of operation of these stands is based on the excitation of an intense non-stationary broadband vibration mode using an explosive energy source in a system of elastic-inertial elements (resonator), affecting the test object. The presented analytical technique is used to predict the test modes implemented by the vibro-shock stand in the form of a shock spectrum and for pre-test calculations in order to adjust the characteristics of the stand, ensuring the implementation of the necessary test modes. The reliability of the calculation results performed according to this technique is confirmed by experimental data. \u0000Key words: dynamic stiffness, method of initial parameters, shock loading, pyrotechnic separation means, ground experimental development, vibro-shock strength, vibro-shock stands of explosive action.","PeriodicalId":384878,"journal":{"name":"Space engineering and technology","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125557450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vladimir V. Коshlakov, Kirill V. Gotovtsev, L. Zakharenkov, A. V. Karevskiy, Evgeny N. Kiryushin, Aleksandr S. Lovtsov, Yu. A. Oshev, Aleksandr V. Semenkin, Aleksandr E. Solodukhin, Sergey Yu. Fedotov, S. Y. Fedyunin, Andrey G. Tsvetkov
{"title":"TEST BENCH EQUIPMENT OF KELDYSH RESEARCH CENTRE \u0000FOR TESTING HIGH-PERFORMANCE POWER AND PROPULSION SYSTEMS","authors":"Vladimir V. Коshlakov, Kirill V. Gotovtsev, L. Zakharenkov, A. V. Karevskiy, Evgeny N. Kiryushin, Aleksandr S. Lovtsov, Yu. A. Oshev, Aleksandr V. Semenkin, Aleksandr E. Solodukhin, Sergey Yu. Fedotov, S. Y. Fedyunin, Andrey G. Tsvetkov","doi":"10.33950/spacetech-2308-7625-2022-1-80-95","DOIUrl":"https://doi.org/10.33950/spacetech-2308-7625-2022-1-80-95","url":null,"abstract":"Expanding space exploration in near-Earth space and deep space calls for an increase in power supply of space vehicles to a level of hundreds of kilowatts and higher. Pre-requisite for successful implementation of works on development of power propulsion systems of such power level, including those with nuclear energy sources, is availability of a full-scale experimental test bench equipment. A unique experimental test bench has been built and is successfully operating at JSC «Keldysh Research Center», which allows performing both research and developmental tests of key components of high-performance power and propulsion systems under conditions close to nominal operating conditions. The article describes the main components of JSC «Keldysh Research Center» test bench equipment, presents some results of the work fulfilled on it, outlines prospects for its furtherance and use in development of space high-performance power and propulsion systems.\u0000Key words: testing, ground developmental testing, power conversion system, test bench equipment, electric propulsion, power and propulsion system.","PeriodicalId":384878,"journal":{"name":"Space engineering and technology","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131702724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}