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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The KSFM Journal of Fluid Machinery
Journal Basic Information
Journal DOI :
Korean Fluid Machinery Association
Editor in Chief :
Volume & Issues
Volume 3, Issue 4 - Dec 2000
Volume 3, Issue 3 - Sep 2000
Volume 3, Issue 2 - Jun 2000
Volume 3, Issue 1 - Mar 2000
Selecting the target year
A Study for the Improvement of Performance of the Water-meter applying the Hydrodynamic Journal Bearing Theory
Yoon, Joon-Yong ; Sung, Nak-Won ; Kim, Byung-Ho ;
The KSFM Journal of Fluid Machinery, volume 3, issue 1, 2000, Pages 5~9
A study to minimize the error in water-meter is considered in this work. It is presumed that the large amount of error at large flowrate is occurred due to the vibration of the impeller shalt. After a newly designed bushing applying hydrodynamic journal bearing theory is adopted, the error at large flow rate is decreased remarkably comparing with the classical water-meter. It is concluded that the effect of a bushing in water-meter stabilizes the rotator of the impeller shaft.
Computational Study on the Performance of the Impeller in Centrifugal Pump
Kim, Won-Kap ; Kang, Shin-Hyoung ;
The KSFM Journal of Fluid Machinery, volume 3, issue 1, 2000, Pages 10~18
This paper reports the impeller performance of centrifugal pump, modified HES65-250. Developed CFD code uses SIMPLE algorithm, power-law scheme, standard
turbulence model in curvilinear coordinate system. The calculations are conducted for 5 cases, from 0.6 to 1.4 of flow rate ratio with 0.2 increment. The flow characteristics inside of impeller are analysed. The results show that reversal flows exist at the inlet of impeller which have small rotary stagnation pressure. The obtained results are compared with the experimental data at impeller exit and shows good qualitative agreement.
Analysis of the three-dimensional Steady Flow through A Multi-blade Centrifugal Fan
Seo, Seoung-Jin ; Chen, Xi ; Kim, Kwang-Yong ; Kang, Shin-Hyoung ;
The KSFM Journal of Fluid Machinery, volume 3, issue 1, 2000, Pages 19~27
A numerical study is presented for analysis of three-dimensional incompressible turbulent flows in a multi-blade centrifugal fan. Reynolds-averaged Navier-Stokes equations with a standard
turbulence model are discretized with finite volume approximations. The computational area is divided into three blocks; inlet core, impeller and scroll parts, which are linked by a multi-block method. The flow inside of the fan is regarded as steady flow, and the mathematical models for the impeller forces were established from a cascade theory and measured data. Empirical coefficients are obtained comparing between computational and experimental results for the case without scroll, and are employed to simulate the flow through the impeller with scroll. In comparisons with experimental data, the validity of the mathematical models for the impeller forces was examined. The characteristics of the flow in the scroll were also discussed.
Influence of Impeller Outlet Angles in Pump Flow Patterns and Characteristics
Lee, Sun-ki ;
The KSFM Journal of Fluid Machinery, volume 3, issue 1, 2000, Pages 28~36
For the improvement of the pump characteristics in the partial capacity range, it must be verified that the influence of the impeller design factor on the internal flows and the influence of the impeller internal flows on the pump characteristics. In this paper, in order to understand the influence of outlet angles on flow conditions and characteristics of a mixed flow pump, experiments were carried out for four kinds of impeller, which have the same inlet angle distributions and meridional section shapes. Results shown that separation and stall in the partial capacity range were enlarged by the outlet angles. The relationship between the separation and the stall at the impeller and the discharge flow conditions were clarified.
A Study on the Gas Pulsation in a Horizontal Scroll Compressor
Choi, Jin Sub ; Kim, Hyun Jin ;
The KSFM Journal of Fluid Machinery, volume 3, issue 1, 2000, Pages 37~42
Analytical and experimental investigations have been carried out on the gas pulsations in the discharge paths of a high-side horizontal scroll compressor, where the gas discharged from compression chamber is made to pass through several chambers inside the compressor shell. Model of Helmholtz resonators in series has been applied to this configuration to predict gas pulsation phenomena along the passages, and the calculation results have been compared with measured pressure time traces. Good agreements between the analytical and experimental results have been obtained. It has also been found that the compressor performance is somewhat affected by the size of individual chambers inside the compressor shell.
Upgrade Development of a Centrifugal Compressor for Marine Engine Turbochargers
Oh, Jong Sik ; Oh, Koon Sup ; Yoo, Kwang Taek ;
The KSFM Journal of Fluid Machinery, volume 3, issue 1, 2000, Pages 43~50
Upgrade development of a high pressure ratio centrifugal compressor in marine engine turbochargers is presented. A new matched operating point at increased speed of rotation was determined through system cycle analysis using the exisitng test data of turbine performance. Under some severe restrictions for geometric parameters, the state-of-the-art methods of both aerodynamic design and CFD analysis were applied, in which only an impeller, a vaned diffusor and some part of casing wall were modified. Prototype hardware was fabricated and assembled for system performance tests. Excellent performance in pressure ratio and efficiency was obtained over whole speed region. Reduced surge and choke margin was, however, observed at design speed of rotation.
펌프 관련 KS 규격의 선진화 연구 - 펌프 관련 KS규격의 개정(안) 해설-
The KSFM Journal of Fluid Machinery, volume 3, issue 1, 2000, Pages 51~73
유량계 기술 동향
The KSFM Journal of Fluid Machinery, volume 3, issue 1, 2000, Pages 74~78