VESTNIK of Samara University. Aerospace and Mechanical Engineering最新文献_第8页

Basic aspects of topological technology of automated on-board equipment layout in space vehicle compartments using the example of “Yantar-2k” Earth remote sensing space vehicle 以“扬塔尔-2k”地球遥感空间飞行器为例，研究了空间飞行器舱室机载设备自动化布置拓扑技术的基本方面

VESTNIK of Samara University. Aerospace and Mechanical Engineering Pub Date : 2023-01-18 DOI: 10.18287/2541-7533-2022-21-4-7-24

A. A. Belyakov, A. Shulepov

{"title":"Basic aspects of topological technology of automated on-board equipment layout in space vehicle compartments using the example of “Yantar-2k” Earth remote sensing space vehicle","authors":"A. A. Belyakov, A. Shulepov","doi":"10.18287/2541-7533-2022-21-4-7-24","DOIUrl":"https://doi.org/10.18287/2541-7533-2022-21-4-7-24","url":null,"abstract":"The article presents the theoretical foundations of automated design of on-board equipment layout in spacecraft compartments in terms of topology. The purpose of the work is to create a flexible arrangement model that would allow solving the problem for any configuration of the structure, taking into account the engineering and operational restrictions imposed on the objects located in a limited space. The technology is formalized according to the methods of the foundations of topology and in this work is demonstrated for a two-dimensional case by comparing it with a reference design-layout scheme. The functional, installation, dimensional, thermal, vibroacoustic requirements are taken into account with the mass-centering restrictions of the layout. In the course of the study, a new approach to describing the design process of assembling on-board equipment was obtained, which can be fully digitized and then integrated into known computer-aided design systems. It has been verified using the example of the power supply system of the Yantar-2k spacecraft.","PeriodicalId":265584,"journal":{"name":"VESTNIK of Samara University. Aerospace and Mechanical Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115706172","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}

引用次数: 0

Calculation of optimum transfers from high-elliptic orbits to geostationary orbits using a stationary plasma engine 用静止等离子体发动机计算高椭圆轨道到地球静止轨道的最佳转移

VESTNIK of Samara University. Aerospace and Mechanical Engineering Pub Date : 2023-01-18 DOI: 10.18287/2541-7533-2022-21-4-25-32

A. Kvetkin, A. Kolesov

引用次数: 0

Series of diagnostic indicators of gearbox teeth wear in aircraft gas turbine engines 航空燃气涡轮发动机齿轮箱齿磨损诊断指标系列

VESTNIK of Samara University. Aerospace and Mechanical Engineering Pub Date : 2023-01-18 DOI: 10.18287/2541-7533-2022-21-4-109-117

A. Y. Sundukov, Ye. V. Shakhmatov

{"title":"Series of diagnostic indicators of gearbox teeth wear in aircraft gas turbine engines","authors":"A. Y. Sundukov, Ye. V. Shakhmatov","doi":"10.18287/2541-7533-2022-21-4-109-117","DOIUrl":"https://doi.org/10.18287/2541-7533-2022-21-4-109-117","url":null,"abstract":"Aircraft gas turbine engine gearboxes are intended for providing optimum rotational speeds for propellers and fans. Wear of the tooth flanks is their key and most dangerous defect. The defect generates vibrations leading to fatigue failure of engine components. Vibration-based diagnostics is the most effective tool of non-destructive testing of the technical condition of rotating machines. This review of the known diagnostic indicators of the defect in question shows the need for its significant expansion. Previously performed researches made it possible to suggest a series of diagnostic indicators of tooth wear for the sun gear satellites couple in the differential reducer of a gas turbine engine. It is shown that the mathematical models of the dependence of the levels of diagnostic indicators on the wear value have both linear and power form. It was found that diagnostic indicators described by power dependences are the closest ones to the model of wear development. It is noted that when selecting diagnostic indicators for operating conditions, the optimal ones should be recognized as those based on the parameters of the current frequency.","PeriodicalId":265584,"journal":{"name":"VESTNIK of Samara University. Aerospace and Mechanical Engineering","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127774602","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}

引用次数: 0

Optical characteristics of a multilayer solar sail and their effect on its heliocentric motion 多层太阳帆的光学特性及其对其日心运动的影响

VESTNIK of Samara University. Aerospace and Mechanical Engineering Pub Date : 2023-01-18 DOI: 10.18287/2541-7533-2022-21-4-52-65

M. A. Rozhkov

引用次数: 1

Analysis of the influence of lubricant supply conditions on the pressure distribution in squeeze-film dampers 润滑油供应条件对挤压膜阻尼器压力分布的影响分析

VESTNIK of Samara University. Aerospace and Mechanical Engineering Pub Date : 2022-11-18 DOI: 10.18287/2541-7533-2022-21-3-108-115

D. K. Novikov, N. S. Shliandina

{"title":"Analysis of the influence of lubricant supply conditions on the pressure distribution in squeeze-film dampers","authors":"D. K. Novikov, N. S. Shliandina","doi":"10.18287/2541-7533-2022-21-3-108-115","DOIUrl":"https://doi.org/10.18287/2541-7533-2022-21-3-108-115","url":null,"abstract":"One of the most common ways to reduce vibration in aircraft engines is the use of damping devices. Squeeze-film dampers are the dampers most widely used in aircraft engine designs. The efficiency of squeeze-film dampers is determined by their damping capacity which depends, among other parameters, on the static pressure of oil supply to the damper. This article proposes a method for calculating the static pressure in the feed groove of a hydrodynamic damper depending on the geometric size of the end gap and the value of the lubricant supply pressure. The parameters influencing the static pressure in the damper end gap are determined. Calculations are performed for different values of a hydrodynamic damper end gap, the number and diameter of the supply ports. All calculations presented in the article were performed for a short squeeze-film damper with end gaps and throttles. For comparison of parameters, the dynamic pressure was also calculated for a long squeeze-film damper. It was shown that the size of the end gap has the strongest impact on the pressure in the groove of a squeeze-film damper. It was also shown that the dynamic pressure in the gap may be significantly higher than the static pressure of supply, and failure of the lubricating film may result. In addition, it was also shown that the size of the damper end clearance affects the lubricant flow through the damper.","PeriodicalId":265584,"journal":{"name":"VESTNIK of Samara University. Aerospace and Mechanical Engineering","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121310161","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}

引用次数: 0

Gas-dynamic losses in the flow part of the channel charge of a solid-propellant rocket engine 固体推进剂火箭发动机通道装药流动部分的气体动力损失

VESTNIK of Samara University. Aerospace and Mechanical Engineering Pub Date : 2022-11-18 DOI: 10.18287/2541-7533-2022-21-3-47-57

A. N. A. N. Sabirzyanov, Chulpan Khamatnurova, V. Kuzmin

{"title":"Gas-dynamic losses in the flow part of the channel charge of a solid-propellant rocket engine","authors":"A. N. A. N. Sabirzyanov, Chulpan Khamatnurova, V. Kuzmin","doi":"10.18287/2541-7533-2022-21-3-47-57","DOIUrl":"https://doi.org/10.18287/2541-7533-2022-21-3-47-57","url":null,"abstract":"Modern methods of computational fluid dynamics have been used to study flows with mass supply in axisymmetric channels of solid-propellant rocket motor charges. The studies were carried out with the aim of increasing the accuracy of predicting the intraballistic parameters for performing engineering calculations. The analysis of changes in intraballistic characteristics in the flow part of the channel charge in the classical and nozzleless solid propellant rocket motors is carried out for different rates of mass supply from the combustion surface. For an isobaric combustion chamber, a characteristic velocity profile is shown along a tubular charge path and a charge with sudden expansion. It is shown that for a steady cosine profile of axial velocity after sudden expansion of the channel, a length of more than three gauges is required. For a high-speed combustion chamber, a comparison of the axial velocity profile is carried out depending on the flow velocity under different conditions of mass supply. The tendency of the influence of flow velocity on the character of the profile is noted. It is shown that at a Mach number over 0.5, an increase in the mass flow rate from the combustion surface provides a less filled velocity profile tending to cosine. The differences between the pressure losses in the flow passage of the channel charge, calculated in the axisymmetric approximation, and the losses determined using gas-dynamic functions, are shown. An increase of the mass flow rate in the charge channel of a nozzleless solid-propellant rocket motor leads to a decrease in pressure losses at Mach number over 0.8.","PeriodicalId":265584,"journal":{"name":"VESTNIK of Samara University. Aerospace and Mechanical Engineering","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124449208","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}

引用次数: 0

Kinetic model and kerosene surrogate for calculating gas turbine engine emission of carcinogenic hydrocarbons 计算燃气轮机致癌性碳氢化合物排放的动力学模型和煤油替代物

VESTNIK of Samara University. Aerospace and Mechanical Engineering Pub Date : 2022-11-18 DOI: 10.18287/2541-7533-2022-21-3-58-68

A. S. Semenikhin, D. V. Idrisov, I. V. Chechet, S. Matveev, S. V. Lukachev

{"title":"Kinetic model and kerosene surrogate for calculating gas turbine engine emission of carcinogenic hydrocarbons","authors":"A. S. Semenikhin, D. V. Idrisov, I. V. Chechet, S. Matveev, S. V. Lukachev","doi":"10.18287/2541-7533-2022-21-3-58-68","DOIUrl":"https://doi.org/10.18287/2541-7533-2022-21-3-58-68","url":null,"abstract":"To calculate the emission of carcinogenic polycyclic aromatic hydrocarbons by the combustion chambers of aircraft gas turbine engines, the A17 kinetic model has been developed, characterized by new blocks of elementary chemical reactions of hydrocarbon compounds oxidation and synthesis of polycyclic aromatic hydrocarbons. The results of model validation showed satisfactory agreement with the experimental data and the possibility of applying the model to describe combustion processes in gas turbine engine combustion chambers. A review and numerical study was carried out for 14 surrogates (model fuels) of aviation kerosene, the combustion of which can be described using the A17 model. Simulation of stabilized flame of a previously prepared mixture showed the effectiveness of Drexel, Liu, su4, UM1 surrogates, the predictions for which agree satisfactorily with the experimental data and provide the expected levels of concentration of polycyclic aromatic hydrocarbons. The calculations show the dependence of the concentration of the most carcinogenic polycyclic aromatic hydrocarbon benzo(a)pyrene, and the ratio of the main combustion products CO2/H2O on the molar mass of the fuel. For the experimentally determined value of the molar mass of kerosene TS-1, the smallest deviation (up to 0.25%) is demonstrated by the su4 and UM1 surrogates. Due to the best predictive capability for the ignition delay time, normal flame propagation speed, pyrolysis and combustion products, the su4 and UM1 surrogates can be chosen to calculate the emission of carcinogenic polycyclic aromatic hydrocarbons from aircraft gas turbine engine combustion chambers.","PeriodicalId":265584,"journal":{"name":"VESTNIK of Samara University. Aerospace and Mechanical Engineering","volume":"8 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130309479","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}

引用次数: 0

Diagnostic indicators of tooth flank wear based on the analysis of tooth spectral component parameters 基于齿谱成分参数分析的齿面磨损诊断指标

VESTNIK of Samara University. Aerospace and Mechanical Engineering Pub Date : 2022-11-18 DOI: 10.18287/2541-7533-2022-21-3-141-149

A. E. Sunduckov

{"title":"Diagnostic indicators of tooth flank wear based on the analysis of tooth spectral component parameters","authors":"A. E. Sunduckov","doi":"10.18287/2541-7533-2022-21-3-141-149","DOIUrl":"https://doi.org/10.18287/2541-7533-2022-21-3-141-149","url":null,"abstract":"The wear of gear tooth flanks of aircraft gas turbine engines is the most common and the most dangerous of their defects. Practice shows that vibroacoustic diagnostics is the most effective method for monitoring the technical condition of rotary machines, including gears. It has been shown that, in this case, it is difficult to use a widely applied diagnostic indicator of gear tooth flank wear as the intensity of an n-dimensional vector from a series of tooth harmonics. This is due to the need to measure vibration parameters in a wide frequency range and low intensity of higher tooth harmonics. The factors affecting the kinematic error, such as: technological factors (manufacturing and assembly defects), operational mode-related factors (speed, temperature, transmitted load), design-related factors (flexibility of gearing parts, tooth flank modification), and tooth flank wear, lead to a significant increase in the width of the tooth spectral component. This allowed us to suggest diagnostic indicators of wear based on the analysis of changes in its width. Using the example of a turboprop differential gearbox, we experimentally confirmed that the use of an auto power spectrum with filter width much smaller than the width of the tooth spectral component is ineffective in studying the defect being considered. The parameters of the spectral component of the first tooth harmonic such as its width at the selected levels relative to the maximum value and their combinations, and the tooth harmonic intensity defined as a function of the power spectrum density are more sensitive to wear. The resulting dependences of the proposed parameters on the amount of wear have a pronounced non-linear nature. These diagnostic indicators allow several-fold reduction of the frequency range being analyzed.","PeriodicalId":265584,"journal":{"name":"VESTNIK of Samara University. Aerospace and Mechanical Engineering","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130036638","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}

引用次数: 0

Two-channel optimal discrete law of control of spacecraft with aerodynamic and inertial asymmetry during descent in Mars atmosphere 具有气动和惯性不对称的航天器在火星大气中下降时的双通道最优离散控制律

VESTNIK of Samara University. Aerospace and Mechanical Engineering Pub Date : 2022-11-18 DOI: 10.18287/2541-7533-2022-21-3-36-46

Оптимальный Дискретный, Закон Управления, Космического Аппарата, Атмосфере Марса

引用次数: 1

Dynamic tasks in models of product operability 产品可操作性模型中的动态任务

VESTNIK of Samara University. Aerospace and Mechanical Engineering Pub Date : 2022-11-18 DOI: 10.18287/2541-7533-2022-21-3-116-126

A. Ragutkin

引用次数: 0