캐비티가 존재한 사각 단면 분류층 연소실내에서 2상류의 유체역학적 거동에 관한 연구

A Study on The Hydrodynamic Behaviours of Two Phase Flow in Rectangular Entrained Flow Combustor with Cavity

  • 박상규 (여수수산대학교 기계공학과)
  • 발행 : 1997.02.01

초록

본 연구에서는 미분탄과 공기를 혼합하여 노즐을 통하여 바닥면에 캐비티가 존재한 사각단면 분류층 연소실로 분사 시킬 때에 분사된 혼합유동의 평균속도,농도 및 난류특성치들의 유체역학적 거동을 3차원 측정이 가능한 PDA를 이용하여 실험적으로 규명하였다. 바닥면의 재부착점은 X/D=15인 부근에서 나타나며, 재부착점 이후에서 부터 각 단면의 상사성이 이루어지는 것으로 나타났다. 사각 연소실 바닥면 관통의 영향을 받아 난류강도와 난류전단용력의 최대값은 중심축보다 높은 Y/D=6인 점에서 최대가 되며, 미분탄의 농도는 Y/D=6~8인 점에서 최대값이 나타났다.

The present study is aimed to investigate experimentally on the hydrodynamic behaviours of air ~ pulverized coal flow in rectangular combustor with cavity. Mean velocity, density and tur¬bulent properties of pulverized coal in rectangular entrained flow combustor were measured by PDA. Experimental results show that the flow reattachment point at the lower plane in the com¬buster chamber has been developed near X/D= 15. The similarities at each section are found after the flow reattachment point. The maximum values of turbulent intensity and Reynolds shear stress have been shown near Y/D=6, which is higher than centerline. The maximum density of the pulverized coal sited in the range ofY/D=6~8.

키워드

참고문헌

  1. Power Engineering v.15 no.4 四角切向燃燒 煤粉鍋爐 燃用无烟煤的 下行性分析 Chuan wei biao
  2. Journal of Combustion Science and Technology v.1 no.1 Evolution of combustion Techiques with Fuelrich Coal Stream Qin Yu Kun;Sun Shaozeng;Sun Shaozeng;Wi Shaohua
  3. 中國電力 第1期 Combustion of High Concentraion Pulverized Coal and Left Right Dense Thin Phase Technique Yuan Jian wei;Xu minghou;Shang Chang lian;Man Cai Yuan
  4. 中國電力 第7期 Analysis on the Dense -thin Separation Combustion Technology of Pulverized Coal Chuan Wei Biao
  5. Power Engineering v.15 no.2 개봉둔체와 둔체 PDA 측량 및 저휘발분 매분열태 대비적 시험연구 Shi Xue Feng;Qion Ren Zhang;Xiao Ping Hua
  6. Gas Solid Flows ASME v.121 Analysis of Gas Particle Two Phase Jet over a Cylinderical Surface: Diffusion of Solid Particles T. Shakouchi;A. Ichikawa
  7. JSME International Journal v.32 no.3 Analysis of -Two Dimesional, Turbulent Wall Jet Along a Circular Cylinder T. Shakouchi;Y. Onsoheru;S Kato
  8. Journal of the Korean Socity of Mechanical Engineers v.35 no.12 A Note on Integrated Coal Gasification Combined Cycle Technology Kim jong jin
  9. PDA Installation and User's guide DANTEC