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Abstract: The paper describes features of the industrial engineering and labor rating for flexible manufacturing systems in the flexible automated cell. The paper formulates the rules for the optimal industrial engineering in a flexible automated cell, which delimit the functionality of a CNC machine operator, a transport robot, automated rack storage, and a CNC machine. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040024
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Abstract: This paper presents the results of experiments on the methane-hydrogen mixture combustion in a test bench model of a dual-mode wide-range ramjet combustion chamber with a variable geometry flow path, obtained as part of a work under the LEA program. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040140
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Abstract: The identification of stiffness of the blade supports at lateral bending vibrations is considered. A beam model is used for elastic restraint. The target functional is applied in the form of the squared discrepancy between the experimental and theoretical values of deformations. The minimization of the functional is carried out by iterations using the sensitivity apparatus. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040279
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Abstract: This paper studies a computational and experimental method for stress-strain analysis and selection of efficient design for composite curved tubes. A finite element-based design model is developed. The paper presents the strength calculation results as well as compares the properties of curved tubes with different reinforcement patterns produced from various materials. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040073
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Abstract: The paper considers an electric pump unit of the spacecraft thermal control system. The aim of the work is to create a simulation model, which allows analyzing the distribution of temperature fields and the stress-strain state in the electric pump structure. The influence of structural materials on the transient behavior is also investigated for the changing the heat transfer agent temperature in the system. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040036
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Abstract: The paper considers the problem of collisions between flight and ground vehicles at the airport. The statistics of such incidents at Russian and foreign airports is systematized. Collisions are classified according to the level of danger of their consequences. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040280
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Abstract: This paper presents the results of holographic studies for angular contact rolling ball bearings of gas turbine engines. From these studies, the technical condition of angular contact ball rolling bearings was diagnosed and the cause of the defect—rupture of the cage’s side connecting strip, was determined. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040139
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Abstract: In the context of the theory of turbulent combustion, the main characteristics of the combustion chamber, namely, the completeness and combustion temperature are studied in a swirling jet. PubDate: 2021-10-01 DOI: 10.3103/S106879982104019X
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Abstract: This paper considers wave solid-state gyroscopes with volumetric resonators operating in the mode of angular velocity sensors for onboard control systems and flight safety. The results of laboratory bench tests of wave solid-state gyroscopes with metal cylindrical and silicon ring resonators are presented. Possibilities of their use in aircraft onboard systems are indicated. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040218
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Abstract: Processes of accelerated ions attenuation due to the resonance charge exchange and elastic scattering processes are examined in the paper. In addition, we study the process of generation for charge exchange and elastic scattering ions. We estimated numerically the attenuation process of accelerated ions and of secondary particles flows. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040188
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Abstract: The statistical contingency fuel determination method was developed for the objects “long-range aircraft type—fixed route”. The statistical contingency fuel reserve is numerically determined for the period of 2016–2018 years for the Boeing 777 type fleet on the scheduled flights Moscow–Khabarovsk and Moscow–Yuzhno-Sakhalinsk. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040012
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Abstract: The possible composition of aggregates and components of the fuselage structure of a multi-purpose helicopter is considered. For a number of existing serial multi-purpose (passenger, transport) helicopters, a method is proposed for constructing a correlation relationship between the mass of the fuselage and the measured projection area of the general view of the fuselage. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040267
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Abstract: The paper investigates the applicability of various turbulence models for accurate modeling the aerodynamic surface design of unmanned aerodromeless transport aircraft. The numerical results are compared with the experimental data obtained as a result of the study of the airfoil section on an air test bench. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040061
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Abstract: To determine the aeroacoustic characteristics of a quadcopter, large eddies of a turbulent flow induced by a four-blade impeller are simulated. The acoustic analogy method based on the integration of the Ffowcs Williams–Hawkings equation is used to calculate the acoustic noise in the far field. A spectral analysis of the acoustic noise generated by the impeller is performed, and the directional patterns of acoustic radiation are plotted for various rotor rotation speeds that simulate the vertical take-off and landing modes. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040103
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Abstract: The problem of creating a wireless power transmission system for aviation technology, providing power to onboard equipment with a power of at least 30 W in accordance with the planned update of the Qi standard, is considered. A prototype of a wireless power transmission system for aviation technology, which is resistant to external influences, was made. Numerical calculations of the load capacity of the wireless power transmission system are carried out. PubDate: 2021-10-01 DOI: 10.3103/S106879982104005X
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Abstract: As a result of 3D calculation in the ANSYS CFX, the numerical investigation was carried out of local and averaged heat transfer coefficients, hydrodynamic characteristics of cooling channels with two V-shaped dimples with hemispherical protrusions between them for the case of its location by in-line and staggered orders; and also with two V-shaped dimples and hemispherical protrusions between them and twin dimples on the two vertexes of V-shaped dimples. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040152
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Abstract: The paper describes the process of optimization of the airfoil parametrized by the Bezier curve with the use of multicriteria methods of stochastic optimization, namely, the genetic algorithm and the particle swarm method. Various methods of multiparametric optimization are compared in conditions of a significantly viscous environment. The influence of the first approximation on the final geometry of the airfoil is revealed. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040115
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Abstract: The main provisions of the methodology for calculating the landing of a helicopter on a tricycle wheeled landing gear, taking into account all the necessary design features of this type of landing gear and the peculiarities of the main rotor near the ground surface, are described. The comparison of computational studies with experimental data obtained during flight tests of the Mi-38 helicopter is presented. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040085
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Abstract: The analysis tools for the process of nitrogen aircraft supplying under various modes of flight intensity as a part of realistic scenarios is developed and substantiated by the methods of simulation models. Regression relations are proposed by the least squares to describe the logistic forecasting of the aerodrome nitrogen supply. A volume of backup storage is determined that is capable to meet the airfield requirements and for how long in the case of one air separation plant operation and various average values of departing aircraft. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040048
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Abstract: The paper considers peculiarities of operation conditions of blades of industrial and marine gas turbine plants and prospects of their development. The new nickel single-crystal high-temperature alloy is proposed for gas turbine cooled blades, which is distinguished by high structure stability and resistance to marine salt corrosion. PubDate: 2021-10-01 DOI: 10.3103/S1068799821040231
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