고온 금속 표면에서 물 분사에 의한 열전달실험 = Experimental study for water nozzle spray cooling of hot metal surface

다국어 초록 (Multilingual Abstract)

An experimental study was conducted for the heat transfer from hot walls to liquid water sprays. Three thickness, oval, full cone nozzles were used at different pressures, giving specific water flow rate impinging on the wall, W, from 20 to 200 liter/㎡ sec.
A test-piece was heated to about 500℃ and rapidly cooled by water sprays. Two inner temperatures were measured by thermocouples.
The inverse heat conduction problem was then solved to yield the wall temperature and the heat flux transferred to the spray at temperature. As a result, cooling curves expressing the heat flux as a function of wall temperature were obtained. The heat fluxes were found to depend on the specific water flow rate and wall temperature. Simple correlations for heat fluxes were proposed.

목차 (Table of Contents)

• 목차
• 기호 및 약어 설명
• 제 1 장 서론 = 1
• 1.1 연구 배경 = 1
• 1.2 이론적 배경 = 3
• 제 2 장 Water-spray 노즐의 분무 실험 = 7
• 2.1 노즐의 분무 특성 = 7
• 2.2 국소 유량 분포의 측정 = 10
• 2.3 입자 크기와 입자 속도 = 14
• 제 3 장 고온 금속 표면의 냉각 열전달 실험 장치 및 실험방법 = 18
• 3.1 실험장치 = 18
• 3.2 시편 = 20
• 3.3 온도 측정 및 데이터 저장 = 21
• 3.4 실험조건 = 23
• 제 4 장 열전달 해석 및 실험결과의 분석 = 26
• 4.1 역열전달 해석 = 26
• 4.2 실험결과 및 분석 = 33
• 제 5 장 열유속 수식화 = 45
• 제 6 장 결론 = 53
• Reference = 55
• Appendix A Measured data and Out put data of Inverse conduction analysis = 57
• Appendix B Inverse heat conduction program = 69
• Appendix C Drop size and velocity data = 77
• ABSTRACT = 84