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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korea Society For Power System Engineering
Journal Basic Information
Journal DOI :
The Korea Society for Power System Engineering
Editor in Chief :
Volume & Issues
Volume 3, Issue 4 - Nov 1999
Volume 3, Issue 3 - Aug 1999
Volume 3, Issue 2 - May 1999
Volume 3, Issue 1 - Feb 1999
Selecting the target year
Recycling of Composite Materials
Moon, C.K. ; Kim, Y.U. ;
Journal of the Korea Society For Power System Engineering, volume 3, issue 4, 1999, Pages 5~15
Numerical Simulation of Turbine Cascade Flowfields Using Two Dimensional Compressible Navier-Stokes Equations
Chung, H.T. ; Kim, J.S. ; Sin, P.Y. ; Choi, B.S. ;
Journal of the Korea Society For Power System Engineering, volume 3, issue 4, 1999, Pages 16~21
Numerical simulation on two-dimensional turbine cascade flow has been performed using compressible Navier-Stokes equations. The flow equations are written in a cartesian coordinate system, then mapped into a generalized body-fitted ones. All direction of viscous terms are incoporated and turbulent effects are modeled using the extended
model. Equations are discretized using control volume SIMPLE algorithm on the nonstaggered grid sysetem. Applications are made at a VKI turbine cascade flow in atransonic wind-tunnel and compared to experimental data. Present numerical results are shown to be in good agreement with the experimental results and simulate the compressible viscous flow characteristics inside the turbine blade passage.
Experimental Study on Heat Transfer Characteristics for Single-phase Flow in Plate & Shell Heat Exchangers by Using Wilson Plot Method
Seo, M.K. ; Kim, Y.S. ; Lee, S.K. ;
Journal of the Korea Society For Power System Engineering, volume 3, issue 4, 1999, Pages 22~27
Single phase heat transfer coefficients were measured for turbulent water flow in a plate & shell heat exchangers by using Wilson plot method. An experiment for counterflow heat exchange between the plate and shell was performed. The shell side heat transfer resistance was varied and the overall heat transfer coefficients were measured. The single-phase heat transfer coefficients in a plate side were obtained by Wilson plot method. Single-phase heat transfer correlations based on projected heat transfer area have been proposed for a plate & shell heat exchanger.
A Study on Abnormal Noise Reduction of Scroll Compressor
Ahn, B.H. ; Kim, Y.S. ;
Journal of the Korea Society For Power System Engineering, volume 3, issue 4, 1999, Pages 28~35
An application of scroll compressor to the residential air conditioning and heat pump markets has generated many reliability problem, especially abnormal noise. Most of these noise problems is due to the check valve and compliance between FS(Fixed Scroll) and OS(Orbiting Scroll). FS and OS are the main parts of scroll compressor and are the main pumping part. But check valve has the role of protection of reverse rotation of OS when power is off. Check valve have several noise problems. Among them, shut down noise and valve movement noise is more than severe than any other problem. In this paper covers with these two noise problem.
Passive Vibration Suppression With an Enhanced Shunted Piezoelectric Circuit
Kim, W.C. ; Park, C.H. ;
Journal of the Korea Society For Power System Engineering, volume 3, issue 4, 1999, Pages 36~44
A Study on Oxygen Dissolution by Air Lift Pump
Oh, S.K. ;
Journal of the Korea Society For Power System Engineering, volume 3, issue 4, 1999, Pages 45~50
Fundamental Study on Degradation Evaluation of Marine Diesel Engine Exhaust Valve by Nondestructive Test
Sim, K.H. ; Kim, H.S. ; Nam, K.W. ;
Journal of the Korea Society For Power System Engineering, volume 3, issue 4, 1999, Pages 51~56
The ultrasonic method, which is well known as nondestructive test method, is widely used to evaluate the material damage due to degradation. However, this method is just used for measuring the crack size and the thickness loss of the tube. The purpose of this study is to investigate the applicability of the ultrasonic technique for the evaluation of marine diesel engine exhaust valve and to suggest the correlations between the ultrasonic characteristics and valve degradation. From the evaluation of the results obtained, the technique of using the ultrasonic property was founds to be a efficient method to evaluate the degree of marine diesel engine exhaust valve by nondestructive test.
Analysis in Capacitor of Microaccelerometer Sensor Using Tunnelling Current Effect
Kim, O.S. ;
Journal of the Korea Society For Power System Engineering, volume 3, issue 4, 1999, Pages 57~62
The microaccelerometer using a tunnelling current effect concept has the potential of high performance, although it requires slightly complex signal-processing circuit for servo-system. The paddle of micro accelerometer is pulled to have the gap width of about 2nm which almost allows the flow tunnelling current. This paper demonstrates at capacitor of microaccelerometer the use of the coupled thermo-electric analysis for voltage, current, heat flux and Joule heating then tunnelling current flows. Two electrodes are applied to the microaccelerometer producing a unform difference of temperature gradient and electric potential between the paddle and the substrate.
Determination of Optimal Machining Parameters Using Genetic Algorithm
Choi, K.H. ; Yook, S.H. ;
Journal of the Korea Society For Power System Engineering, volume 3, issue 4, 1999, Pages 63~68
The determination of the optimal machining parameters in metal cutting, such as cutting speed, feed rate, and depth of cut, is an important aspect in an economic manufacturing process. The main objective in general is either to minimize the production cost or to maximize the production rate. Also there are constraints on all the machining operations which put restrictions on the choice of the machining parameters. In this paper as an objective function the production cost is considered with two constraints, surface finish and cutting power. Genetic Algorithm is applied to determine the optimum machining parameters, and the effectiveness of the applied algorithm is demonstrated by means of an example, turning operation.
Self-Tuning Control of Multivariable System
Lee, D.C. ;
Journal of the Korea Society For Power System Engineering, volume 3, issue 4, 1999, Pages 69~78
In the single-input and single-output system, the parameter of plant is scalar polynomial, but in the multiple input and multiple output, it accompanies, being matrix polynomial, the consideration of observable controlability index or problems non-commutation in matrix polynomial as well as degree, and it is more complex to deal with. Therefore, it is thought that a full research on the single-input and single-output system is not sufficient. This paper proposes that problems of minimum variance self-tuning regulator by using numerical calculation example of multivariable system and pole assignment self-tuning regulator.
A Robustness Control of Magnetic Levitation System Using Linear Matrix Inequality
Kim, C.H. ; Yang, J.H. ;
Journal of the Korea Society For Power System Engineering, volume 3, issue 4, 1999, Pages 79~85
The magnetic levitation system is utilized in the magnetic bearing of high-speed rotor system because of little friction, no lubrication, no noise and so on. The magnetic levitation system needs the feedback controller for the stabilization of system, and gap sensors are generally used to measure the gap. The use of sensor easily goes into troublesome caused by sensor failure discord between the measurement point and the control point etc. This paper gives a controller design method of magnetic levitation system which satisfies the given
control performance and the robust stability of the presence of physical parameter perturbations. To the end, we investigated the validity of the designed controller through results of simulation.