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scientific edition of Bauman MSTU


Bauman Moscow State Technical University.   El № FS 77 - 48211.   ISSN 1994-0408

Power Machine Building, Metallurgical Machine Building and Chemical Engineering

Hydroelectric drive with throttle control with enhanced energy efficiency
# 10, October 2012
DOI: 10.7463/1012.0465528
P.V. Scherbachev, S.E. Semenov
The paper describes the construction diagram of a hydroelectric drive with throttle control. The authors consider an algorithm for controlling the drive, which increases its efficiency. They provide a mathematical model of the drive. The authors propose an algorithm for synthesis of the control signal; the algorithm is based on applying the method of modified Lagrange function for constrained minimization. As a criterion to be minimized the authors selected the flow rate of the pumping station subject to the minimum unevenness of rotational velocity of the output link of the drive. Calculation of points for optimization was performed by the numerical solution of equations for a mathematical model. The modeling resulted in control algorithm that significantly improved energy efficiency of the drive.
Study of a loop heat pipe evaporator
# 09, September 2012
DOI: 10.7463/0912.0453646
A.A. Yakomaskin
Development of loop heat pipes (LHP) is connected with their miniaturization. To reduce thickness of the CTT it is necessary to optimize the evaporation zone. For this purpose, a pilot evaporator open to the atmosphere was created; it consists of a microchannel plate with intercostal length of 300 micrometers, a wick and a compensation chamber. The area of the heat supplier is 19x19 mm. Water is a heat carrier. The experiments provided data on temperature distribution along the height of the wick, on temperature in the compensation chamber and on temperature of a microchannel plate surface. These data offer opportunities to further optimize the evaporation zone, which will create thinner evaporators.
Reliability, main mailfunctions and causes of failures of high pressure pumps in accumulator fuel systems of diesel engines
# 09, September 2012
DOI: 10.7463/0912.0453572
E.M. Tausenev, A.E. Svistula
Development of high pressure fuel pumps for Common Rail (CR) was not in the focus of studies until 1997.In fact, problems of efficiency, resource, cost and simplicity were significant. In this paper much attention is paid to malfunctions of the plunger drive in CR high pressure fuel pumps. The authors consider the question of using desaxial in CR high pressure fuel pumps. The authors give the main results of studying the desaxial cam gear pump system of immediate action. In it the desaxial significantly affects reliability. As of today, there are no evidence-based recommendations for selection of desaxial value in CR high pressure fuel pumps. The authors prove the relevance of research of desaxial eccentric mechanism used in them; the authors specify requirements for safety of CR high pressure fuel pumps and describe the main malfunctions and their causes.
Use of heat insulators for reparation, maintenance and modernization of diesel fuel injection equipment. Goal setting, selection and research methods.
# 08, August 2012
DOI: 10.7463/0812.0452551
E.M. Tausenev, A.E. Svistula
The article presents a review of previous studies on thermal effects during fuel injection. It was found out that the most important is fuel heating as a result of heat supply from the walls of the fuel pipe and due to compression. As of today, no one has studied yet the degree and causes of heating of fuel pipe walls during a benchmark testing of diesel engines and during operation in the engine compartment. It is not known to what extent this is affected by heating of the fuel system when heat comes from other parts of the and from hot air around it. The authors suggest that during the use of diesel in the engine compartment fuel heating will be higher than during benchmark testing of the diesel engine. This paper shows what solutions are used to reduce fuel heating in diesel and gasoline engines to date. The authors propose to study the possibility of applying insulating materials in order to reduce fuel heating in the fuel system of a diesel engine.
Analysis of effective use of nitrous oxide as a fuel component for propulsion systems of small spacecrafts
# 09, September 2012
DOI: 10.7463/0912.0450400
A.V. Voroneckii, K.Yu. Aref'ev
The paper presents the results of a system analysis of efficiency of nitrous oxide ( N2O ) as a fuel component for small spacecrafts (SSC). The authors define the criterion for mass efficiency of the propulsion system (PS) of small spacecrafts. They show the current global level of development of SSC  remote control. Application field of nitrous oxide in SSC  remote control was calculated, and mass efficiency of N2O application was quantitatively defined.
Determining the impact of basic geometric parameters drain pump NM 10000-210 on its performance
# 08, August 2012
DOI: 10.7463/0812.0445666
V.O. Lomakin, A.V. Artemov, A.I. Petrov
 The paper describes the choice of main criteria for assessing the quality of building a drainage pump NM10000-210. The aim of selection of the main criteria is correct assessment of optimization of building drainage through simulation program STAR CCM +. According to simulation results values ​​of evaluation criteria for 20 sample points were obtained. Further, after analyzing the simulation results and geometric parameters the authors defined ranges of changed geometrical parameters for which the quality criteria of profiling have the lowest / highest values. They suggest choosing the settings jointly by two criteria of quality assessment, while the determining criterion is minimization of friction losses.
Development of electroflotation devices and their testing
# 07, July 2012
DOI: 10.7463/0712.0431540
B.S. Ksenofontov, A.V. Bondarenko, S.N. Kapitonova
 This paper describes researches on inseparable methods of microorganism's biomass production, particularly - yeast biomass production by electro-flotation. The obtained data show that electro-flotation rate with separation of electrode spaces is approximately twice as high as the rate of regular flotation. For intensification of regular flotation and obtaining stable results, a laboratory plant with ejection flotation was created. Such flotation plant has advantages in formation of very small air bubbles. A set of experiments was carried out to prove the possibility of yeast suspension separation with vibration filters (acoustical filters) and hydro cyclones. The obtained data show high potential of inseparable methods of microorganism's biomass production including methods based on flotation. On the basis of these results, the electro-flotation tank allowing one essentially to increase efficiency of water purification at smaller specific energy consumption was developed and patented.
Numerical simulation of flow parts of pump models and verification of simulation results by comparison of obtained values with experimental data.
# 05, May 2012
DOI: 10.7463/0512.0356070
A.I. Petrov, V.O. Lomakin
The paper deals with the methodology and results of CFD simulation of the oil pump NM2500-230 model. The dependences of the pump head and shaft torque on the pump flow were obtained by way of simulation. The results of numerical simulation were compared with experimental results subject to balance tests. Graphic illustrations of fluid flow in the flow part of the pump elements in different operation modes of the pump are presented in the article. The authors analyzed the error in the numerical experiment.
77-30569/354657 Creating parameterized 3D-models of the flow part in centrifugal pumps
# 04, April 2012
V.O. Lomakin, P.V. Scherbachev, O.I. Tarasov, P.A. Pokrovsky, S.E. Semenov, A.I. Petrov
The article describes a new method of automated building parameterized 3D-models of centrifugal pumps. The purpose of modeling is to provide source data for optimization of air-gas channels in type HM pumps by hydrodynamic simulation methods. The first element to be optimised was a volute pump. The algorithm for constructing 3D-models of the discharge device is based on the Bezier curves. Basing on the basic geometrical parameters of the drain, the proposed method allows to automatically create its geometry in the most popular graphics packages SolidWorks and CATIA, and to export the package simulation STAR CCM +.
77-30569/347727 Optimization of geometric parameters of NM oil pump volute
# 03, March 2012
V.O. Lomakin, A.I. Petrov, A.I. Stepanyuk
In this paper the authors describe a technique of multi-criteria optimization of geometrical parameters of a retractor in the main NM oil pump. The optimization is based on the LP-tau search method; the test points are analyzed by the technique of numerical simulation of fluid flow inside the volute. An example of optimization of the volute of the NM3600-230 pump is presented. Minimization of head loss in the retractor and minimization of the radial load on the pump rotor were taken as optimization criteria. The variant of the flow part, which differed from the original one by smaller loss of the pressure head and significantly decreased load, was obtained as the result of optimization.
77-30569/340675 Intensification of Waste Water Flotation Treatment by Vibration Excitement for Water Recycling
# 02, February 2012
B.S. Ksenofontov, M.V. Ivanov
Ways of flotation treatment plants usage for water recycling is described in this paper. A critics of widely used water recycling systems is given. Ways to intensify waste water flotation treatment by vibration excitement for water recycling is shown. A principal scheme of vibro- flotation tank is given for water treatment. A design of this flotation tank is shown, based on the developed mathematic model. A good correlation between theoretical and experimental data is obtained. 
77-30569/339499 Numerical analysis of non-conservative acoustic systems for working process initialization devices in high-enthalpy flow generators
# 02, February 2012
A.V. Voroneckii, A.R. Pоlyanskii, K.Yu. Aref'ev
The development of non-electric systems of multiple ignition for gas generating devices of rocket and space technologies is a pressing task. One of the promising systems is a gas dynamic system of ignition allowing to implement the progressive technology of “automatic launch”. The authors carried our simulation of local heating of a working body in an acoustic resonator with the help of solving the Navier-Stokes equation system. The results of the development of a resonant system of working process initialization in the high-enthalpy flow generator and preparation for carrying out experimental research of the modeling gas dynamics igniter sample are presented in this work.
77-30569/289750 Automated system for control of the Al form of section manufacturing
# 11, November 2011
A.D. Zhargalova, S.Y. Dudnikov
One of the important tasks of the modern manufacturing is product quality control assurance. This article deals with the quality control assurance of secondary aluminum forms of section and creating of the mathematical model of manufacturing quality control. Block diagram of manufacturing process with artificial neural network using was developed. Proposed model and algorithm became the foundation for developing of automated system for manufacturing quality control assurance. Proposed system tested on real problems presents stability of analysis of parameters of products quality
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