Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Study on the cooling water supply method to the cooling water injection nozzle in the steam generator

증기발생기 내 냉각수 분사 노즐로의 냉각수 공급 방법에 관한 연구

  • Oh, Jeong-hwa (Department of Aerospace Engineering, Chungnam National University) ;
  • Shin, Min-kyu (Department of Aerospace Engineering, Chungnam National University) ;
  • Cho, Young-seok (Department of Aerospace Engineering, Chungnam National University) ;
  • Ko, Young-sung (Department of Aerospace Engineering, Chungnam National University)
  • 오정화 (충남대학교 항공우주공학과) ;
  • 신민규 (충남대학교 항공우주공학과) ;
  • 조영석 (충남대학교 항공우주공학과) ;
  • 고영성 (충남대학교 항공우주공학과)
  • Received : 2020.04.21
  • Accepted : 2020.06.30
  • Published : 2020.10.31
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Abstract

In this study, a method for increasing the initial water supply was employed to protect the water injection nozzle by the flame when supplying the water to the steam generator. During the initial steam generator test, the flow rate was controlled by using the only venturi, but cooling water was not supplied to the combustion chamber at the beginning of combustion, thereby resulting in damage to the water nozzle. To solve this problem, a venturi and an orifice were configured in parallel to increase the initial supply flow rate to form a differential pressure between the water manifold and the combustion chamber. Venturi and orifice supply sequences were established through the water flow tests, and combustion tests were conducted for final verification. Consequently, a continuous supply of the cooling water at the beginning of combustion was achieved, and the experiment was successfully performed without damaging the cooling water nozzle.

본 연구에서는 증기발생기 내부로 냉각수 공급 시 화염에 의한 냉각수 분사 노즐 손상이 없도록, 초반 냉각수 공급량을 늘리는 방안에 대한 연구를 진행하였다. 초기 증기발생기 시험 시 벤추리만 사용하여 유량을 제어하였는데, 초반 유량 안정화 구간 동안 연소실 내부로 냉각수 공급이 되지 않아 냉각수 노즐의 손상이 발생하였다. 이를 해결하기 위해 벤추리와 오리피스를 병렬로 구성하여, 초반 공급 유량을 늘림으로써 냉각수 매니폴드와 연소실 사이 차압을 형성시켜 냉각수를 공급하였다. 수류시험을 통해 벤추리와 오리피스 공급 시퀀스를 확립하였으며, 최종 검증을 위해 연소실험을 진행하였다. 실험 결과 연소 초반 지속적으로 냉각수를 공급하는 것을 확인하였으며, 냉각수 노즐 손상 없이 성공적으로 실험을 수행하였다.

Keywords

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