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한국분무공학회> 한국분무공학회지(구 한국액체미립화학회지)

한국분무공학회지(구 한국액체미립화학회지) update

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수록정보
수록범위 : 1권1호(1996)~26권1호(2021) |수록논문 수 : 821
한국분무공학회지(구 한국액체미립화학회지)
26권1호(2021년 03월) 수록논문
최근 권호 논문
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KCI등재

1가열된 표면에 고착된 액적의 증발 특성에 관한 수치해석 연구

저자 : 정찬호 ( Chan Ho Jeong ) , 이형주 ( Hyung Ju Lee ) , 윤국현 ( Kuk Hyun Yun ) , 이성혁 ( Seong Hyuk Lee )

발행기관 : 한국분무공학회 간행물 : 한국분무공학회지(구 한국액체미립화학회지) 26권 1호 발행 연도 : 2021 페이지 : pp. 1-8 (8 pages)

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Droplet evaporation has been known as a common phenomenon in daily life, and it has been widely used for many applications. In particular, the influence of the different heated substrates on evaporation flux and flow characteristics is essential in understanding heat and mass transfer of evaporating droplets. This study aims to simulate the droplet evaporation process by considering variation of thermal property depending on the substrates and the surface temperature. The commercial program of ANSYS Fluent (V.17.2) is used for simulating the conjugated heat transfer in the solid-liquid-vapor domains. Moreover, we adopt the diffusion-limited model to predict the evaporation flux on the different heated substrates. It is found that the evaporation rate significantly changes with the increase in substrate temperature. The evaporation rate substantially varies with different substrates because of variation of thermal property. Also, the droplet evaporates more rapidly as the surface temperature increases owing to an increase in saturation vapor pressure as well as the free convection effect caused by the density gradient.

KCI등재

2전단동축형 분사기들의 미립화 특성에 대한 연구

저자 : 안종현 ( Jonghyeon Ahn ) , 이근석 ( Keunseok Lee ) , 안규복 ( Kyubok Ahn )

발행기관 : 한국분무공학회 간행물 : 한국분무공학회지(구 한국액체미립화학회지) 26권 1호 발행 연도 : 2021 페이지 : pp. 9-17 (9 pages)

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Six shear coaxial injectors with different recess length and taper angle were manufactured. Cold-flow tests on the injectors were performed at room temperature and pressure using water and air as simulants. By changing the water mass flow rate and air mass flow rate, spray images were taken under single-injection and bi-injection. Breakup length and spray angle were analyzed from instantaneous and averaged spray images using image processing techniques. For all the injectors, the breakup length generally decreased as the momentum flux ratio increased at the same gas mass flow rate. The injectors with 7.5° taper angle usually had the longest breakup length and the smallest spray angle. When the taper angle was 15° or more, it hardly affected breakup length and spray angle. The recess length did not influence breakup length but its effect on spray angle depended on the taper angle.

KCI등재

3극저온의 흡기 온도 조건에서 실린더 내 디젤 연료의 분무 특성

저자 : 민세훈 ( Se Hun Min ) , 서현규 ( Hyun Kyu Suh )

발행기관 : 한국분무공학회 간행물 : 한국분무공학회지(구 한국액체미립화학회지) 26권 1호 발행 연도 : 2021 페이지 : pp. 18-25 (8 pages)

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The objective of this study is to investigate the effect of cryogenic intake air temperature on the injected fuel droplet behavior in a compression ignition engine under the different start of energizing timing. To achieve this, the intake air temperatures were changed from -18℃ to 18℃ in steps of 9℃, and the result of fuel evaporation rate, Sauter mean diameter, and equivalence ratio distributions were compared. When the intake air temperature decreased in steps of 9℃, less fuel was evaporated by about 3.33% because the cylinder temperature was decreased. In addition, the evaporated fuel amount was increased with retarding the start of energizing timing because the cylinder temperature raised. However, the difference was decreased according to the retarded start of energizing timing because the cylinder pressure was also increased at the start of fuel injection. The equivalence ratio was reduced by 5.94% with decreasing the intake air temperature. In addition, the ignition delay was expected to longer because of the deteriorated evaporation performance and the reduced cylinder pressure by the low intake air temperature.

KCI등재

4저속 충돌 제트로 생성되는 액막의 두께 분포 특성 연구

저자 : 한명준 ( M. J. Han ) , 전영우 ( Y. U. Jeon ) , 서태원 ( T. W. Seo ) , 강보선 ( B. S. Kang )

발행기관 : 한국분무공학회 간행물 : 한국분무공학회지(구 한국액체미립화학회지) 26권 1호 발행 연도 : 2021 페이지 : pp. 26-32 (7 pages)

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In this study, the thickness of the liquid sheet formed by two low speed impinging jets was measured by the direct contact method. The effects of jet velocity and liquid viscosity on the thickness were analyzed and the results were compared with theoretical modeling and optical thickness measurement results. The liquid film thickness decreased as the radius and circumferential angle increased. The jet velocity did not affect the liquid film thickness as predicted in theoretical modeling. In the theoretical modeling, there was no influence of the fluid properties on thickness, but in the case of low viscosity liquids, the thickness was predicted high, and it was well matched in high viscosity liquids. The direct measurement results showed no significant difference from the optical measurement results, thus confirming the reliability of the optical measurement method.

KCI등재

5Y-jet 노즐의 출구오리피스 형상이 비대칭 분무에 미치는 영향

저자 : 백광열 ( Gwang Yeol Baik ) , 홍정구 ( Jung Goo Hong )

발행기관 : 한국분무공학회 간행물 : 한국분무공학회지(구 한국액체미립화학회지) 26권 1호 발행 연도 : 2021 페이지 : pp. 33-39 (7 pages)

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Y-jet nozzle has a wide fuel flow rate range and turn-down ratio, thus, it is used in industrial boilers, furnace and agricultural atomizer. However, it has asymmetrical spray characteristics due to the nozzle design factors. Therefore, in this study, asymmetric spraying characteristics of the elliptical Y-jet nozzle was studied by using the lab-scale spray apparatus. As a result, the elliptical Y-jet nozzle had lower gas mass flow rate than circular Y-jet nozzle at same gas pressure, because of bigger shear stress due to the wider inner surface at the elliptical Y-jet nozzle. Larger SMD was measured on the elliptical Y-jet nozzle than the circular Y-jet nozzle. When SMD was measured in the X_Axis direction at the same gas mass flow rate, the elliptical Y-jet nozzle with an aspect ratio of 2:1 showed greater asymmetry than the others.

KCI등재

6합성가스 스파크점화 과급 엔진에서 희박 연소를 통한 열효율 및 배기 개선

저자 : 박현욱 ( Hyunwook Park ) , 이준순 ( Junsun Lee ) , 나랑후잠스랑 ( Narankhuu Jamsran ) , 오승묵 ( Seungmook Oh ) , 김창업 ( Changup Kim ) , 이용규 ( Yonggyu Lee ) , 강건용 ( Kernyong Kang )

발행기관 : 한국분무공학회 간행물 : 한국분무공학회지(구 한국액체미립화학회지) 26권 1호 발행 연도 : 2021 페이지 : pp. 40-48 (9 pages)

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Lean combustion was applied to improve the thermal efficiency and emission in a single-cylinder, spark-ignition engine fueled with syngas. Under naturally aspirated conditions, the lean combustion significantly improved the thermal efficiency compared to the stoichiometric combustion, mainly due to the reduction in heat transfer loss. Intake air boost was applied to compensate the low power output of the lean combustion. The gross indicated power of 24.8 kW was achieved by increasing the intake pressure up to 1.6 bar at excess air ratio of 2.2. The nitrogen oxides showed near zero level, but the carbon monoxide emission was significant.

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가장 많이 인용된 논문
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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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2미국의 비트코인 규제

(2006)홍길동심리학41회 피인용

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2미국의 비트코인 규제

(2006)홍길동41회 피인용

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