- 1열 원형 충돌수분류군에 의한 열전달의 실험적 연구 (제2보, 노즐-전열면간 거리의 영향)
- ㆍ 저자명
- 엄기찬,이종수,김상필
- ㆍ 간행물명
- 空氣 調和·冷凍 工學 論文集
- ㆍ 권/호정보
- 2000년|12권 1호|pp.59-66 (8 pages)
- ㆍ 발행정보
- 대한설비공학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
In a previous paper, we have examined the effects of nozzle configuration and jet to jet spacing on the heat transfer of 1 row of circular water jets. In this paper, experiments have been conducted to obtain the effects of nozzle to target plate distances on the heat transfer of 1 row of 3 jets and 1 row of 5 jets. The nozzle configurations are Cone type, Reverse cone type and Vertical circular type. Nozzle to target plate distance H was varied from 16 mm(H/D=2) to 80mm(H/D=10). For fixed value of mass flow rate and nozzle to target plate distance, larger values of average Nusselt number were obtained for the smaller jet to jet spacing. For the array of water jets, the average heat transfer was decreased slightly with increasing nozzle to target plate distance at low jet velocity of $ extrm{V}_{o}$=3 m/s. However, except for $ extrm{V}_{o}$=8 m/s of 1 row of 5 jets, it was increased with increasing nozzle to target plate distance at high jet velocity of $ extrm{V}_{o}$$geq$6m/s. We proposed to apply the nozzle configuration of maximum average heat transfer to each nozzle to target plate distance for 1 row of 3 jets, and, it was Reverse cone type nozzle for 1 row of 5 jets(Reynolds number$geq$36000).