서지주요정보
분사기공 형상에 따른 디젤 분무의 특성 = Effect of nozzle geometric on the common-rail diesel spray characteristics
서명 / 저자 분사기공 형상에 따른 디젤 분무의 특성 = Effect of nozzle geometric on the common-rail diesel spray characteristics / 공장식.
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8013854

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 03012

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

Diesel injection nozzles, incorporated with common-rail high pressure injection system, have the variety in its geometries. The design parameters of injection nozzle need to meet the requirement of compact fuel spread and atomization followed by mixing with air and combustion in HSDI (High Speed Direct Injection) diesel engines. Diesel injector with VCO nozzle which has the tapered injection hole, represented by K factor, was tested to investigate the spray characteristics by optical imaging techniques and LDV techniques. Global characteristics of non-evaporative transient diesel spray, such as spray penetration and spray angle were measured from macroscopic images, which were frozen by an instantaneous photography with spark light source and CCD camera. Entrainment of ambient gas in a diesel spray was measured by LDV technique. Spray characteristics and entrainment experiment were taken in a pressurized chamber (up to 30bar) at various ambient conditions and fuel supply pressures for taper nozzle geometries. The holes with different geometry in nozzles, especially differently tapered holes (0~2 in K factor), were found to give different macroscopic behavior in terms of spray penetration and spray angle. Higher K factor showed faster penetration and smaller spray angle. Entrainment rate increased with the distance from the nozzle. The rail pressure and density of surrounding gas had an effect on entrainment rate. But K factor(taperedness) did not affect entrainment rate.

서지기타정보

서지기타정보
청구기호 {MME 03012
형태사항 vi, 54 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jang-Sik Kong
지도교수의 한글표기 : 배충식
지도교수의 영문표기 : Choong-Sik Bae
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 52-54
주제 디젤분무
분사기공형상
Diesel spray
k factor
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