권호 표지

The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery

  • Bimonthly
  • /
  • 2287-9706(pISSN)

Domain

  • Machinery ＞ Energy/Environment Machine System

Aim & Scope

The KSFM Journal of Fluid Machinery publishes archival-quality papers in the areas of the state-of-the-art of fluid machinery. The broad scope of the subject matter includes the thermodynamics, fluid mechanics and heat transfer technology associated with the design, analysis, modeling, test and performance of fluid machinery. The majority of papers present original analytical, numerical, experimental results and physical interpretation of the fluid machinery. Specific topic areas include: pump and hydraulic turbines; fan and ventilation systems; compressor; gas and steam turbines; duct and pipe flows; rotor dynamics; ship and ocean energy; waste management systems; membrane process water plant; CFD; general fluid engineering.

http://acoms.atit.co.kr:9090/kfma1/index.jsp?publisher_cd=kfma1&cid=&cid_year=2013&cid_seq=A&lang=kor KSCI KCI

Volume 9 Issue 6 Serial No. 39

  1. Jang, Choon-Man;Choi, Seung-Man;Kim, Kwang-Yong 9
    https://doi.org/10.5293/KFMA.2006.9.6.009 PDF KSCI
    Performance characteristics of an axial flow fan having distorted inlet flow have been investigated using numerical analysis as well as experiment. Two kinds of hub-cap, rounded and right-angled front shape, are tested to investigate the effect of inlet flow distortion on the fan performance. Numerical solutions are validated in comparison with experimental data measured by a five-hole probe downstream of the fan rotor. It is found from the numerical results that non-uniform axial inlet velocity profile near the hub results in the change of inlet flow angle. Large recirculation flow upstream the fan rotor for the right-angled hub-cap induces a negative incidence, thus invokes separated flow on the blade surfaces and deteriorates the performance of fan rotor.
  2. Kim, Sa-Ryang 17
    https://doi.org/10.5293/KFMA.2006.9.6.017 PDF KSCI
    The numerical simulations on the train entering a tunnel were performed by solving unsteady axi-symmetric problems. In the case that 5th order velocity profile is used to reduce the effects of the pressure wave generated by the train starting abruptly, the effect of the initial distance between the train and the tunnel were examined. The impulsive start gives undesired pressure disturbances to the flow field including inside the tunnel. But 5th order velocity profile with initial distance more than 80 m gives much stable pressure variance in time, and pressure distribution inside the tunnel in space. The distance to the train reaches the highest running velocity from the start should be more than 80 m when the train speed is 350 km/h.
  3. Lee, Jong-Joon;Yoon, Jae-Eun;Kim, Tong-Seop 22
    https://doi.org/10.5293/KFMA.2006.9.6.022 PDF KSCI
    Operation of a microturbine was simulated on the basis of component characteristic parameters obtained from performance test. Characteristic parameters, such as compressor and turbine efficiencies, recuperator effectiveness as well as turbine inlet temperature, were obtained for a wide operation range. Component characteristics including performance maps and characteristic curves were generated using measured data. Based on the component characteristics, a simulation program was constructed and operation of the microturbine was simulated, and the simulated results were compared with the measured data to verify the program. Also, influence of variation in the power control scheme on the operating characteristic and performance of the engine was simulated. The simulation program can be used for predicting operation of both healthy and degraded engine conditions.
  4. Yu, Hye-Ran;Park, Warn-Gyu 29
    https://doi.org/10.5293/KFMA.2006.9.6.029 PDF KSCI
    Propeller type pump has been widely used for pumping water in agricultural and manufacturing industry. Since a propeller type pump contains a screw impeller inside a circular casing, the numerical analysis becomes complex. However, the accurate prediction of viscous flow is essential for computing hydrodynamic performances. To analysis the flow and the performance of the propeller type pump, the present work has solved 3D incompressible RANS equations on the multiblocked grid. From the present calculation, small amount of flow separation was shown near hub and the flow was recovered to nearly uniform inflow after one diameter downstream. Torque and thrust coefficient were computed and compared with experiments.
  5. Yoon, Soo-Hyoung;Jeong, Dae-Hwan;Kim, Tong-Seop 35
    https://doi.org/10.5293/KFMA.2006.9.6.035 PDF KSCI
    Operation conditions of a reheat cycle gas turbine for a combined cycle power plant was analyzed. Based on measured performance parameters of the gas turbine, a performance analysis program predicted component characteristic parameters such as compressor air flow, compressor efficiency, efficiencies of both the high and low pressure turbines, and coolant flows. The predicted air flow and its variation with the inlet guide vane setting were sufficiently accurate. The compressor running characteristic in terms of the relations between air flow, pressure ratio and efficiency was presented. The variations of the efficiencies of both the high and low pressure turbines were also presented. Almost constant flow functions of both turbines were predicted. The current methodology and obtained data can be utilized for performance diagnosis.
  6. Lee, Hee-Sub;Kim, Olang-Ho;Lee, Yong-Bok 45
    https://doi.org/10.5293/KFMA.2006.9.6.045 PDF KSCI
    Turbo-blower as an air supply system is one of the most important BOP (Balance of Plant) systems for FCV(Fuel Cell Vehicle). For generating and blowing compressed air, the motor of air blower consumes maximum 25% of net power, and fuel cell demands a clean air. In this study, turbo-blower supported by air foil bearings is introduced as the air supply system used by 80kW proton exchange membrane fuel systems. The turbo-blower is a turbo machine which operates at high speed, so air foil bearings suit their purpose as bearing elements. Analysis for confirming the stability and endurance is conducted. The rotordynamic stability was predicted using the numerical analysis of air foil bearings and it is verified through experimental works. In spite of various transient dynamic situation, the turbo-blower had stable performances. After the performance test, results are presented. The normal power of driving motor has about 1.6 kW with the 30,000 rpm operating range and the flow rate of air has maximum 160 SCFM. The test results show that the aerodymic performance and stability of turbo-blower are satisfied to the primary goals.
  7. Cho, Chong-Hyun;Choi, Sang-Kyu;Cho, Soo-Yong 54
    https://doi.org/10.5293/KFMA.2006.9.6.054 PDF KSCI
    An experiment about performance characteristics is conducted on a double chamber vane-type rotor. Three different rotors, which have 6, 8 and 9 vanes, are applied to the driver and various lift holes at the rear plate are used to increase the effective vane height. The inner diameter of a double chamber cylinder is ${\phi}27mm$, and the length of the cylinder is 65 mm. The maximum offset length between the rotor outer surface and the cylinder inner surface is 4.5 mm. In this study, specific output torques and powers are measured, and also noise and vibration are measured at the real operating situation. The operating torque on the double chamber is increased to 17% compared to the operating torque obtained at the single chamber which has the same size. The experimental results of noise and vibration show that the operating sound and vibration are directly related to the operating power generated by the double chamber rotor.
  8. O, Chang-Bo;Choe, Beom-Seok 63
    https://doi.org/10.5293/KFMA.2006.9.6.063 PDF KSCI
  9. Kim, Yeong-Nam 69
    https://doi.org/10.5293/KFMA.2006.9.6.069 PDF KSCI
  10. Kim, Chan-Hong 74
    https://doi.org/10.5293/KFMA.2006.9.6.074 PDF KSCI
  11. Kim, Jin-Kwon 81
    https://doi.org/10.5293/KFMA.2006.9.6.081 PDF KSCI
  12. Kim, Jin-Kwon 91
    https://doi.org/10.5293/KFMA.2006.9.6.091 PDF KSCI
  13. Park, Han-Yeong 96
    https://doi.org/10.5293/KFMA.2006.9.6.096 PDF KSCI