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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Transactions of the Korean Society of Mechanical Engineers B
Journal Basic Information
Journal DOI :
The Korean Society of Mechanical Engineers
Editor in Chief :
Volume & Issues
Volume 40, Issue 9 - Sep 2016
Volume 40, Issue 8 - Aug 2016
Volume 40, Issue 7 - Jul 2016
Volume 40, Issue 6 - Jun 2016
Volume 40, Issue 5 - May 2016
Volume 40, Issue 4 - Apr 2016
Volume 40, Issue 3 - Mar 2016
Volume 40, Issue 2 - Feb 2016
Volume 40, Issue 1 - Jan 2016
Selecting the target year
Study of Fuel Consumption Characteristics and Regenerative Braking Recovery Rate in a TMED Type Parallel Hybrid Electric Vehicle
Chung, Jin Ho ; Kim, Jin Su ; Kim, Ju Whan ; Lee, Jin Wook ;
Transactions of the Korean Society of Mechanical Engineers B, volume 40, issue 8, 2016, Pages 485~494
DOI : 10.3795/KSME-B.2016.40.8.485
In this work, we conducted a study of fuel consumption characteristics and regenerative braking recovery rate by conducting an experiment using a TMED type parallel hybrid electric vehicle. As regenerative braking technology is considered essential to improve the energy efficiency of the hybrid vehicle, it is necessary to conduct research on the regenerative braking system. Therefore, the electrical characteristics, current balance, and fuel consumption were investigated using an EC type chassis dynamometer with experimental conditions as per IM240 mode. From the results, it was observed that when the initial SOC condition was lower, the engine operating time of the hybrid vehicle increased, and the energy efficiency decreased. While operating in the driving mode characteristics condition and the driving characteristics condition, the difference in the average fuel consumption was not significant. However, after completion of the experiment, there was a difference in the engine operation.
A Study on the Positioning of Ice Sensors for Assessing Airworthiness of Military Helicopter
Kim, Chan Dong ; Hur, Jang Wook ;
Transactions of the Korean Society of Mechanical Engineers B, volume 40, issue 8, 2016, Pages 495~501
DOI : 10.3795/KSME-B.2016.40.8.495
The measurement of icing conditions needs to be carried out accurately by the ice detector system of an aircraft. Ice detector systems should be installed in locations not affected by backwash, rotor downwash or moving doors or other equipment. Various analyses were carried out in order to find the proper locations sufficiently far from these interfering effects. In this study, the optimum position of the ice detector was assessed using computer simulation, with respect to different flight modes, flow velocities and the amount and distribution of liquid water around the sensor.
Experimental Study on Thermal NOx and CO Emission in a Laboratory-Scale Incinerator with Reversed Secondary Air Jet Injection
Choi, Chonggun ; Choi, Woosung ; Shin, Donghoon ;
Transactions of the Korean Society of Mechanical Engineers B, volume 40, issue 8, 2016, Pages 503~510
DOI : 10.3795/KSME-B.2016.40.8.503
Incinerators generally emit pollutants such as NOx and CO during the combustion process. In this paper, pollutant emissions and temperature distributions were studied in a simulated incinerator with a reversed (relative to the flue gas flow) secondary air injection system. The experiments were performed by using a lab-scale furnace in order to evaluate the effects of the injection location, direction and flow rate of secondary air jets. The emission of NOx was lower in the case of reversed secondary air injection than in the case of cross injection, due to the recirculation and mixing of the exhaust gas. In the reversed air injection cases, thermal NOx emissions decreased as secondary air ratio increased from 30 to 60 and slightly increased at secondary air ratios higher than 60. In most cases, CO emissions were not detected except for a few reversed secondary air injection cases, in which cases CO concentrations below 2ppm were observed.
PIV Measurement of Pulsatile Flows in 3D Curved Tubes Using Refractive Index Matching Method
Hong, Hyeon Ji ; Ji, Ho Seong ; Kim, Kyung Chun ;
Transactions of the Korean Society of Mechanical Engineers B, volume 40, issue 8, 2016, Pages 511~517
DOI : 10.3795/KSME-B.2016.40.8.511
Three-dimensional models of stenosis blood vessels were prepared using a 3D printer. The models included a straight pipe with axisymmetric stenosis and a pipe that was bent
from the center of stenosis. A refractive index matching method was utilized to measure accurate velocity fields inside the 3D tubes. Three different pulsatile flows were generated and controlled by changing the rotational speed frequency of the peristaltic pump. Unsteady velocity fields were measured by a time-resolved particle image velocimetry method. Periodic shedding of vortices occurred and moves depended on the maximum velocity region. The sizes and the positions of the vortices and symmetry are influenced by mean Reynolds number and tube geometry. In the case of the bent pipe, a recirculation zone observed at the post-stenosis could explain the possibility of blood clot formation and blood clot adhesion in view of hemodynamics.
CFD Analysis for Optimization of Guide Vane of Axial-Flow Pump
Yun, Jeong-Eui ;
Transactions of the Korean Society of Mechanical Engineers B, volume 40, issue 8, 2016, Pages 519~525
DOI : 10.3795/KSME-B.2016.40.8.519
In a pump, from the performance point of view, it is very important to minimize the shock loss at the inlet of the rotor blades. In this study, the effects of shape and install angle of the inlet guide on the performance of an axial-flow pump are numerically simulated using commercial CFD code, Ansys CFX. Finally, to obtain the optimized shape of the vanes and the install angle of the vanes in the inlet guide under given operating conditions, optimization analysis is conducted using Analysis design exploration based on response surface optimization.
Development of Empirical Correlation to Calculate Pool Boiling Heat Transfer Coefficient on Inclined Tube Surface
Kang, Myeong-Gie ;
Transactions of the Korean Society of Mechanical Engineers B, volume 40, issue 8, 2016, Pages 527~533
DOI : 10.3795/KSME-B.2016.40.8.527
A new empirical correlation was developed to identify the effect of an inclination angle on pool boiling heat transfer coefficient of a tube submerged in the saturated water at atmospheric pressure. Through the experiments and the survey of published results 431 data points were obtained and the nonlinear least square method was used as a regression technique. The heat flux of the tube(
), inclination angle(
), and the length divided by the diameter of a tube(18~42.52) were selected as major parameters. The newly developed correlation well predicts the experimental data within
, with some exceptions.
Model Reference Adaptive Control of the Air Flow Rate of Centrifugal Compressor Using State Space Method
Han, Jaeyoung ; Jung, Mooncheong ; Yu, Sangseok ; Yi, Sun ;
Transactions of the Korean Society of Mechanical Engineers B, volume 40, issue 8, 2016, Pages 535~542
DOI : 10.3795/KSME-B.2016.40.8.535
In this study, a model reference adaptive controller is developed to regulate the outlet air flow rate of centrifugal compressor for automotive supercharger. The centrifugal compressor is developed using the analytical based method to predict the transient behavior of operating and the designed model is validated with experimental data to confirm the system accuracy. The model reference adaptive control structure consists of a compressor model and a MRAC(model reference adaptive control) mechanism. The feedback control do not robust with variation of system parameter but the applied adaptive control is robust even if the system parameter is changed. As a result, the MRAC was regulated to reference air flow rate. Also MRAC was found to be more robust control compared with the feedback control even if the system parameter is changed.
Development and Evaluation for the Insulated Coupling Test Machine of a Large Wind Turbine
Ju, Sung Ha ; Kim, Dong Hyun ; Oh, Min Woo ; Kim, Su Hyun ; Kang, Jong Hun ; Bae, Jun Wu ; Lee, Hyoung Woo ; Kim, Kyung He ;
Transactions of the Korean Society of Mechanical Engineers B, volume 40, issue 8, 2016, Pages 543~556
DOI : 10.3795/KSME-B.2016.40.8.543
In this work, an insulated coupling test machine for a 5-MW-class wind turbine was designed and developed, along with the public performance testing of a 3-MW-class wind turbine. The results of the device design, development requirements, functional considerations, structural vibration analysis, and the evaluation of the insulated coupling test machine are presented in this study. For the coupling models, thick fiberglass composite pipe insulation, fabricated by filament winding, was considered. Results of three-dimensional finite element analysis conducted using both solid element and shell element modeling were analyzed and compared, considering the effect of thickness. In addition, results from the nonlinear finite element analysis of multiple leaf springs of the laminated disk pack structure were verified and compared with experimental data.