초록

Ⅲ. 연구개발의 내용 및 범위
본 연구에서의 최종목표는 연료전지용 터보챠저의 공력설계 및 성능평가를 수행하는 것으로 1차년도에는 터보차저 단품(압축기, 터빈)의 공력설계를 수행하고, 핵심부품의 성능예측과 설계용 S/W를 활용하여 3차원 형상을 설계하는 것을 연구의 범위로 하고 있다. 따라서 압축기의 형상설계 (3차원형상) 및 터빈의 형상설계 (3차원형상)를 수행하였으며 추가적으로 각 단품에 대한 성능도를 작성하였다.

Abstract ▼

In this study, a centrifugal compressor and a radial turbine using in turbocharger were designed and their performance map was predicted using the computational fluid dynamics (CFD). In the computation, a commercial CFD-code of CFX-12 was applied to calculate the three-dimensional compressible turbu

In this study, a centrifugal compressor and a radial turbine using in turbocharger were designed and their performance map was predicted using the computational fluid dynamics (CFD). In the computation, a commercial CFD-code of CFX-12 was applied to calculate the three-dimensional compressible turbulent flow with the standard turbulence model. In the boundary conditions, total pressure was applied at the inlet and the mass flowrate condition was applied at the exit. The convective term was discretized using the high resolution scheme which is more accurate that the second-order upwind scheme. As the operating condition, this turbocharger operates at the maximum rotational speed of 213,000 RPM, and it the maximum turbine inlet temperature is 800oC. The mass flowrate of the compressor is 589kg/h and its maximum pressure ratio is 5.0. When the performance map predicted by the CFD was compared with the experimental result conducted by the Honeywell, the CFD predicted better performance. The reason for this is because the measuring locations between the CFD and the experiment were different. If the difference of the measuring location is considered, the prediction by the CFD agrees well with the experimental result.
On the radial turbine, its performance map was predicted using the same computational scheme. Onlt difference was the boundary conditions. Two performance maps were predicted; one was the performance map estimated on the part test, another is the performance map obtained by matching with the compressor. In addition, a schematic diagram for experimental utility was developed. In this utility can test the each core part such as compressor or turbine as well as the turbocharger system.

목차 Contents

• 표지 ... 1
• 제출문 ... 2
• 보고서 초록 ... 3
• 요약문 ... 4
• SUMMARY ... 5
• CONTENTS ... 6
• 목차 ... 7
• 제 1 장 연구개발과제의 개요 ... 8
• 제 2 장 국내외 기술개발 현황 ... 9
• 제 1 절 국내·외 연구개발 현황 ... 9
• 제 2 절 현기술의 취약성 ... 9
• 제 3 절 앞으로의 전망 ... 10
• 제 3 장 연구개발수행 내용 및 결과 ... 11
• 제 1 절 터보차져의 공력설계기술 ... 11
• 제 2 절 성능시험장치 ... 23
• 제 4 장 목표달성도 및 관련분야에의 기여도 ... 27
• 제 5 장 연구개발결과의 활용계획 ... 27
• 제 6 장 참고문헌 ... 27