Mathematical Model to Predict the Performance Characteristics of the Torque Converters

1992 ◽  
Author(s):  
Joaquim Emanuel Santini ◽  
Hans Ingo Weber
Keyword(s):  
Mathematical Model ◽  
Performance Characteristics ◽  
Torque Converters

scholarly journals Influence of Nano-Fluid Lubrication On Single Porous-Layered Journal Bearing: A Hypothetical Approach

2021 ◽  
Author(s):  
BIPLAB BHATTACHARJEE ◽  
PRASUN CHAKRABORTI ◽  
KISHAN CHOUDHURY
Keyword(s):  
Mathematical Model ◽  
Boundary Conditions ◽  
Micropolar Fluid ◽  
Journal Bearing ◽  
Performance Characteristics ◽  
Published Data ◽  
Nano Fluid ◽  
Nano Lubricant ◽  
Output Characteristics ◽  
Modified Darcy’S Law

Abstract In this article a mathematical model of single layered nano-fluid lubricated PJB (porous journal bearing) has been formulated. The nano-lubricant's impact on the efficiency of said journal bearing has been studied using modified Darcy's law and boundary conditions. The different nanoparticles often used as an additive in industrial lubricating oils improve their viscosity significantly. The brief description of dimensionless performance characteristics of the investigated bearing was obtained by the use of the nano-lubricant's modified Krieger-Dougherty viscosity model. The observations revealed that the output characteristics are substantially improved by using nano-lubricant. The present study was validated by comparing the findings of recently published data with micropolar fluid and was found to be completely compatible since data with nano-lubricant are still unavailable.

scholarly journals Numeric modeling and estimating the performance characteristics of a pneumatic driven high pressure pump

2018 ◽  
Vol 245 ◽  
pp. 09014 ◽  
Author(s):  
Nikita Zhurkin ◽  
Anatolij Donskoj ◽  
Aleksandr Zharkovskij
Keyword(s):  
Mathematical Model ◽  
High Pressure ◽  
Constant Load ◽  
Constant Volume ◽  
Performance Characteristics ◽  
High Pressure Pump ◽  
Operating Modes ◽  
Computational Data ◽  
The Mathematical Model ◽  
Main Operating

Pneumatic driven high pressure pumps (PDHPPs), having a number of considerable advantages in comparison to other types of high pressure pumps, are widely used in different sectors of modern industry. However, estimating the performance characteristics of a PDHPP is complicated due to the specifics of physical processes taking place during its operation. A mathematical model was developed to solve this problem. Two main operating modes are considered: for constant load and for constant volume, which cover the most common uses of the PDHPPs. The solution of the model made it possible to estimate how various parameters affect the operation of the pump. Thus, with an increasing pressure of compressed air, the volume flow grows at the pump outlet; with a higher pressure of the pumped liquid due to compressibility and a higher load on the drive cylinder, the flow, on the contrary, reduces. In case the PDHPP operates for the constant volume, the time of pressure increase grows with an increase of the required pressure and the value of this volume. The mathematical model and computational data can be used in the development of new and modification of the existing pumps.

Analytical Investigation of the Spiral Groove Face Seal

1973 ◽  
Vol 95 (4) ◽  
pp. 499-510 ◽  
Author(s):  
H. J. Sneck ◽  
J. F. McGovern
Keyword(s):  
Mathematical Model ◽  
Parametric Design ◽  
Analytical Investigation ◽  
Performance Characteristics ◽  
Comprehensive Model ◽  
Inertial Effects ◽  
Face Seal ◽  
Spiral Groove ◽  
Design Studies

An analytical investigation of both a simplified and a comprehensive mathematical model of a spiral groove face seal, using the “narrow seal” approximation. The sealing fluid is assumed to be incompressible and Newtonian. The inertial effects associated with seal curvature are incorporated in the comprehensive model. The results of the analysis are programmed for computer computation in order to facilitate their application in parametric design studies. Performance characteristics are calculated for some particular seal designs.

Optimization of Machining Process Parameters in Drilling of CFRP Using Multi-Objective Taguchi Technique, TOPSIS and RSA Techniques

2017 ◽  
Vol 25 (3) ◽  
pp. 185-192 ◽  
Author(s):  
K. Shunmugesh ◽  
K. Panneerselvam
Keyword(s):  
Mathematical Model ◽  
Process Parameters ◽  
Feed Rate ◽  
Cutting Speed ◽  
Weight Ratio ◽  
High Strength ◽  
Performance Characteristics ◽  
Machining Process ◽  
Taguchi Technique ◽  
Multi Objective

Carbon Fiber Reinforced Polymer (CFRP) are widely used in many engineering applications as replacement for various other elements to make use of the advantage of its high strength-weight ratio, durability and high corrosion resistance. The paper herein is an attempt to evaluate the drilling characteristics of CFRP by means of three different drill bit types (HSS, TiAlN and TiN) using Taguchi L27 (313) orthogonal array under dry condition. Firstly, the machining process parameters (cutting speed and feed rate) are optimized with multiple performance characteristics using Multi-objective Taguchi technique and TOPSIS. Secondly, mathematical model is developed to correlate the machining process parameters and the performance characteristics (surface roughness, circularity and cylindricity) using response surface analysis. ANOVA is used to validate the developed mathematical model of the responses. The investigation reveals that the results of TOPSIS technique are in good agreement with the multi-objective Taguchi technique and also feed rate is the most predominant factor which affects the responses.

Simulation and Experimental of Shifting Performance of Construction Machinery

2014 ◽  
Vol 889-890 ◽  
pp. 998-1002
Author(s):  
Feng Ren ◽  
Xin Hui Liu ◽  
Jin Shi Chen ◽  
Ping Zeng ◽  
Bo Liang Liu
Keyword(s):  
Mathematical Model ◽  
Simulation Model ◽  
Experimental Verification ◽  
Hydraulic System ◽  
System Simulation ◽  
Performance Characteristics ◽  
Construction Machinery ◽  
Working Principle ◽  
Pressure Changes ◽  
Amesim Simulation

The main objective to study shift buffer impact of shifting process of construction machinery.introduces the working principle of main valve and wet multi-clutch,and developing a mathematical model and AMESim simulation model. analyzes the characteristics of pressure changes during the shift, buffering characteristics and impact on the performance characteristics, and experimental verification. The results showed that: the shift hydraulic system simulation model accurately credible; good performance of the system can effectively reduce shift jerk.

scholarly journals COMET: A toolkit for composing customizable genetic programs in mammalian cells

2019 ◽  
Author(s):  
Patrick S. Donahue ◽  
Joseph W. Draut ◽  
Joseph J. Muldoon ◽  
Hailey I. Edelstein ◽  
Neda Bagheri ◽  
...  
Keyword(s):  
Gene Expression ◽  
Mathematical Model ◽  
Transcription Factors ◽  
Zinc Finger ◽  
Mammalian Cells ◽  
Single Layer ◽  
Performance Characteristics ◽  
Boolean Logic ◽  
Design And Construction

ABSTRACTEngineering mammalian cells to carry out sophisticated and customizable genetic programs requires a toolkit of multiple orthogonal and well-characterized transcription factors (TFs). To address this need, we developed the COmposable Mammalian Elements of Transcription (COMET)—an ensemble of TFs and promoters that enable the design and tuning of gene expression to an extent not previously possible. COMET currently comprises 44 activating and 12 inhibitory zinc-finger TFs and 83 cognate promoters, combined in a framework that readily accommodates new parts. This system can tune gene expression over three orders of magnitude, provides chemically inducible control of TF activity, and enables single-layer Boolean logic. We also develop a mathematical model that provides mechanistic insights into COMET performance characteristics. Altogether, COMET enables the design and construction of customizable genetic programs in mammalian cells.

scholarly journals Simulation Model for Prediction of Transient Performance Characteristics of Single–Phase Shaded Pole Motor

2016 ◽  
Vol 67 (4) ◽  
pp. 253-260 ◽  
Author(s):  
Vasilija Sarac ◽  
Tatjana Atanasova-Pacemska
Keyword(s):  
Mathematical Model ◽  
Simulation Model ◽  
Single Phase ◽  
Model Simulation ◽  
Performance Characteristics ◽  
Frame Theory ◽  
Motor Simulation ◽  
Transient Performance ◽  
Different Types ◽  
Operating Regimes

Abstract Paper proposes mathematical model of single phase shaded pole motor suitable for analysis of motor dynamic behavior. Derived mathematical model from d–q reference frame theory is applied at motor simulation model. Derived simulation model enables analysis of transient performance characteristics of motor currents, speed and electromagnetic torque under different operating regimes. Obtained results from the simulation are compared with data from analytical calculations based on method of symmetrical components and data from experiment for the purpose of verification of the simulation model. Simulation model is useful for studying the effect of parameters on motor starting and running characteristics at different types of loads.

Infrared photodetectors based on the system “Hg1−xCdxTe photodiode — direct-injection readout circuit”

2011 ◽  
Vol 19 (2) ◽  
Author(s):  
J. Gumenjuk-Sichevska ◽  
D. Karnaushenko ◽  
I. Lee ◽  
V. Polovinkin
Keyword(s):  
Mathematical Model ◽  
Direct Injection ◽  
Performance Characteristics ◽  
Infrared Photodetectors ◽  
Readout Circuit ◽  
Readout Circuits ◽  
Main Factors

AbstractA mathematical model for multi-element IR FPAs based on Hg1−xCdxTe photodiodes with direct-injection readout circuits is developed. This model was used to identify the main factors that limit the performance characteristics of thermography systems based on such FPAs.

Modeling the Performance Characteristics of Diesel Engine Based Combined-Cycle Power Plants—Part I: Mathematical Model

2004 ◽  
Vol 126 (1) ◽  
pp. 28-34 ◽  
Author(s):  
Stan N. Danov ◽  
Ashwanti K. Gupta
Keyword(s):  
Mathematical Model ◽  
Diesel Engine ◽  
Power Plant ◽  
Energy Conversion ◽  
Steam Turbine ◽  
Nonlinear Differential Equations ◽  
Combined Cycle ◽  
Operating Conditions ◽  
Performance Characteristics ◽  
Combined Cycle Power Plant

In this two-part series publication, a mathematical model of the energy conversion process in a diesel engine based combined-cycle power plant has been developed. The examined configuration consists of a turbocharged diesel engine (the topping cycle), a heat recovery steam generator (HRSG) and a steam turbine plant (the bottoming cycle). The mathematical model describes the processes that occur simultaneously in the diesel engine cylinders, turbocharger, air filter, air inlet pipes, exhaust pipes, HRSG, steam turbine, and the associated auxiliary equipment. The model includes nonlinear differential equations for modeling the energy conversion in the diesel engine cylinders, fuel combustion, gas exchange process, energy balance in the turbocharger, inlet pipes and exhaust system, heat balance in the HRSG, and steam turbine cycle. The fifth-order Kuta-Merson method has been applied for numerical solution of these simultaneous equations via an iterative computing procedure. The model is then used to provide an analysis of performance characteristics of the combined-cycle power plant for steady-state operation. The effect of change in the major operating variables (mutual operation of diesel engine, HRSG, and steam turbine) has been analyzed over a range of operating conditions, including the engine load and speed. The model validation and the applications of the model are presented in Part II (Results and Applications) of this two-part series publication.

scholarly journals Power antenna radar with variable speed

2015 ◽  
pp. 81-87
Author(s):  
V. F. Strelkov ◽  
M. V. Andryushin ◽  
V. V. Vanyev
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Electric Drive ◽  
Electric Motor ◽  
Permanent Magnets ◽  
Performance Characteristics ◽  
Variable Speed ◽  
Motor Shaft ◽  
Radar Antenna ◽  
And Control

A mathematical model of the "mains - regulated electric drive" radar antenna us with a synchronous motor with permanent magnets. Peculiarities of work at a controlled electric variable speed electric motor shaft. A method and control system with motorized adjustable mechanical and electronic scanning of the antenna, improving performance characteristics of radar stations.

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