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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society for Aviation and Aeronautics
Journal Basic Information
Journal DOI :
The Korean Society for Aviation and Aeronautics
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Volume & Issues
Volume 14, Issue 4 - Dec 2006
Volume 14, Issue 3 - Sep 2006
Volume 14, Issue 2 - Jun 2006
Volume 14, Issue 1 - Mar 2006
Selecting the target year
Investigation of Turbulent Combustion Characteristics for Different Injector Port Diameter in Hybrid Rocket
Moon, Hee-Jang ; Koo, Ja-Ye ; Yoon, Chang-Jin ; Min, Moon-Ki ; Jang, Won-Jae ;
Journal of the Korean Society for Aviation and Aeronautics, volume 14, issue 1, 2006, Pages 2~8
Numerical analysis of the flow field in the reactive medium of End-Burring combustor is studied in order to investigate the combustion characteristics of hybrid combustion. The main part of this study is focused on the port diameter effects of oxidizer injector on the temperature distribution within the reactive field. It is found that the case having the largest port diameter(25 mm) delivers the optimum conditions for the design of End-Burring combustor where the predicted temperature field showed the most acceptable distribution.
Measurement of Heat Transfer Coefficient in a Duct with Double Imingement Jets
Kwak, Jae-Su ;
Journal of the Korean Society for Aviation and Aeronautics, volume 14, issue 1, 2006, Pages 9~14
Averaged heat transfer coefficients in the trailing edge model of a turbine blade with double impingements were measured using transient liquid crystals technique and conventional copper plate-thermocouple technique. The detailed distributions of heat transfer coefficients by transient liquid crystals technique were also presented. Results showed that increased heat transfer coefficient due to the inpingements and the averaged heat transfer coefficients increased as Reynolds number increased. Results by transient liquid crystals technique showed that the heat transfer coefficient strongly depended on the main stream temperature used in heat transfer coefficient calculation. The averaged heat transfer coefficients measured by different methods showed similar trend as Reynolds number changed, but the value varied up to 40% depending on the measurement technique.
Parametric Cycle Analysis of a Turbofan Engine with Turbine Cooling
Hwang, Jin-Seok ; Moon, Hee-Jang ; Koo, Ja-Ye ;
Journal of the Korean Society for Aviation and Aeronautics, volume 14, issue 1, 2006, Pages 15~21
Parametric cycle analysis of a dual-spool, mixed exhaust turbofan engine with turbine blade cooling were described to investigate the effect of turbine blade cooling on the engine performance such as specific thrust and thrust specific fuel consumption. Coolant of low pressure turbine triggers high engine performance loss and cooling effect loss in high pressure turbine. Therefore low pressure turbine coolant should be much more considered for effective design.
Nonlinear Aeroelastic Analysis of Flat Plate Wing with Flaperon
Bae, Jae-Sung ;
Journal of the Korean Society for Aviation and Aeronautics, volume 14, issue 1, 2006, Pages 22~27
The linear and nonlinear aeroelastic analyses of a flat plate wing with flaperon have been performed by using frequency-domain and time-domain analyses. Natural modes from free vibration analysis and a doublet-hybrid method (DHM) are used for the computation of subsonic unsteady aerodynamic forces. The flaperon hinge is represented by a free-play spring and is linearized by the described function method. The linear and nonlinear flutter analyses indicate that flapping mode of the flaperon, the hinge stiffness and free-play of hinge have significant effects on the aeroelastic characteristics. From the nonlinear flutter analysis, different modes like stable and unstable limit-cycle-oscillation are observed in same flutter velocity depending on initial conditions.
A Model Reduction Method for Effective Analysis of Structures
Park, Young-Chang ; Hwang, Jai-Hyuk ;
Journal of the Korean Society for Aviation and Aeronautics, volume 14, issue 1, 2006, Pages 28~35
Substructure coupling or component mode synthesis may be employed in the solution of dynamic problems for large, flexible structures. The model is partitioned into several subdomains, and a generalized Craig-Bampton representation is derived. In this paper the mode sets (normal modes, constraint modes) is employed for model reduction. A generalized model reduction procedure is described. Vaious reduction methods that use constraint modes is described in detail. As examples, a flexible structure and a 10 DOF damped system are analyzed. Comparison with a conventional reduction method based on a complete model is made via eigenpair and dynamic responses.
An Optimization Algorithm Using Kriging
Park, Jung-Sun ; Ro, Young-Hee ; Im, Jong-Bin ;
Journal of the Korean Society for Aviation and Aeronautics, volume 14, issue 1, 2006, Pages 36~42
Kriging has been effectively used to approximate for optimization. This study has been devised to improve efficiency and accuracy of approximate optimal design using Kriging. The design of experiments (DOE), the classical design and space-filling design, are used to provide maximum information using minimum number of design of experiments. The proposed methodology is applied to the designs of 3-bar truss and Sandgren's pressure vessel.
Development and Calibration of a Seven-Hole Pressure Probe
Yang, Jae-Hun ; Chang, Jo-Won ;
Journal of the Korean Society for Aviation and Aeronautics, volume 14, issue 1, 2006, Pages 43~48
The present study was carried out in order to develope a seven-hole pressure probe which is able to measure high flow angles. The seven-hole pressure probe is a non-nulling, directional velocity probe used for measuring three dimensional flow that having high flow angles. A 4 mm diameter seven-hole conical pressure probe was manufactured with a cone angle of 70
. The probe was comprised of seven 1 mm diameter stainless steel tubes packed close together and fitted into an outer stainless steel sleeve. The calibration procedure is based on the use of the Callington's polynomial curve-fit method. The validity of the seven-hole conical pressure probe is demonstrated by comparisons with hot-wire data.
The Study on RVSM Safety Assessment of Incheon FIR
Shin, Dae-Won ; Kim, Seung-Kyem ;
Journal of the Korean Society for Aviation and Aeronautics, volume 14, issue 1, 2006, Pages 49~54
The purpose of RVSM is to reduce vertical separation minima for aircrafts which operate between FL290- FL410 inclusive in regional airspace, and to increase airspace capacity by providing additional flight levels. In order to introduce RVSM, it is necessary to estimate quantitatively airborne collision risk due to the reduction in vertical separation minimum. In this study, the basic concept of RVSM safety assessment and Reich collision risk model are introduced and mid-air collision risk in Incheon FIR is estimated based on ICAO RVSM safety assessment technique and Reich Model.
Preliminary Study of Ionosphere for Global Navigation Satellite Systems
Yang, T.H. ; Lee, Y.J. ; Jun, H.S. ; Nam, G.W. ; Kim, J. ;
Journal of the Korean Society for Aviation and Aeronautics, volume 14, issue 1, 2006, Pages 55~62
Ionospheric signal delay is a critical factor for precision differential GNSS(Global Navigation Satellite Systems) applications such as GBAS(Ground-Based Augmentation System) and SBAS (Satellite-Based Augmentation System). Most concern is the impact of the ionospheric storm caused by the interaction between Solar and geomagnetic activities. After brief description of the ionosphere and ionospheric storm, ionospheric models for SBAS are discussed. History of recent ionospheric storms is reviewed and their impact on GNSS is discussed. In order to support Korean GNSS augmentation system development, a preliminary study on the regional ionosphere performed. A software tool for computing regional ionospheric maps is being developed, and initial results during a recent storm period is analyzed.
A Study on Aptitude for Helicopter Pilots through the Job Analysis
Yu, T.J. ; Kim, C.Y. ;
Journal of the Korean Society for Aviation and Aeronautics, volume 14, issue 1, 2006, Pages 63~69
The operational environment of helicopters extends from the civil air traffic control system to remote and hazardous areas and from day operations under visual flight conditions to night operations in adverse weather. Helicopters can move in any direction, remain stationary while airborne, climb and descend vertically, and take off and land almost anywhere. Thus their range of maneuvers and control requirements vary more widely than do those of fixed-wing aircraft. In this study, I analyzed the job of helicopter pilot through methods of observation, and classified the required ability of them into the domain of cognitive, perceptual/spatial, psychomotor. I expect that the result of this study will be used to aid training and selection of helicopter pilot.
Concept Design of Hybrid Aviation Wireless SAR Equipment
Jung, Do-Hee ;
Journal of the Korean Society for Aviation and Aeronautics, volume 14, issue 1, 2006, Pages 70~74
Cospas-Sarsat, an international satellite system for search and rescue, started operating in early 1980's and has been credited with saving thousands of lives since then. Hundreds of thousands of aviators, mariners and land users worldwide are equipped with Cospas-Sarsat distress beacons, which could help save their lives in emergency situations anywhere in the world. This paper outlines the evolution of the system and describes how satellites are constantly circling the globe monitoring for rescue signals, while tracking stations on six continents receive the satellite signals, compute the locations of the distress events and forward the calls for help to the appropriate rescue authorities. Therefore, this paper points out the importance of developing of technologies of Hybrid Aviation Wireless SAR Equipment and also proposes to make it localized.