• Title/Summary/Keyword: kerosene

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Pressure Drop Changes at Engine Fuel Inlet Filter according to Water Contents Management of KSLV-II Liquid Rocket Fuel (한국형발사체 액체로켓 연료의 수분관리에 따른 엔진 연료입구필터 차압의 변화)

  • Hwang, Changhwan;Kim, Inho;Park, Jaeyoung;Kim, Seonglyong;Yoo, Byungil;Cho, Namkyung;Han, Yeoungmin
    • Journal of the Korean Society of Propulsion Engineers
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    • v.24 no.6
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    • pp.120-125
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    • 2020
  • 75 tonf liquid rocket engine combustion test was performed at Naro space center Engine Combustion Test Facility for KSLV-II. A gradual pressure drop was observed during off-design combustion test turbopump inlet condition using cooled kerosene at 271 K. It was found that the water content inside kerosene could cause pressure drop at 40 ㎛ grade filter through the water contests analysis of kerosene, kerosene cooling test and dehydration of kerosene.

Combustion Performance of a Full-scale Liquid Rocket Thrust Chamber Using Kerosene as Coolant (실물형 액체로켓엔진 연소기 케로신냉각 연소시험 성능결과)

  • Han, Yeoung-Min;Kim, Jong-Gyu;Moon, Il-Yoon;Seo, Seong-Hyeon;Choi, Hwan-Seok;Lee, Soo-Yong
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2006.11a
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    • pp.163-168
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    • 2006
  • The combustion performance tests of a 30 tonf-class full-scale combustion chamber performed with kerosene as a coolant were described. The combustion chamber has chamber pressure of 53bara and propellant flow mass rate of 90kg/s. Since it was first firing test for 30tonf-class combustion chamber using kerosene cooling, kerosene coolant mass flow rate of 32kg/s which correspond to 120% of design mass flow rate were performed. Then, the firing test with kerosene mass flow rate of 25kg/s were successfully performed. The test results are described and the results showed that the kerosene cooling performance of this combustion chamber is sufficient and the firing test with regenerative cooling is feasible.

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A Study on the Performance and Emission Characteristics According to the Coolant Temperature of Combustion Chamber Head of Spark Ignition Engine Fuelled with Kerosene (Coal Oil) (Kerosene (Coal Oil)을 사용한 스파크점화기관의 연소실헤드 온도 변화에 따른 엔진 성능 및 배기 특성에 관한 연구)

  • HAN, SUNG BIN;CHUNG, YON JONG
    • Transactions of the Korean hydrogen and new energy society
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    • v.28 no.1
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    • pp.92-97
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    • 2017
  • Kerosene (Coal oil) is a particularly attractive fuel because it is widely used to power jet engines of aircraft as jet fuel and some rocket engine. This paper describes the performance and emission characteristics according to the collant temperature of combustion chamber head of spark ignition engine fuelled with kerosene. As a result, the following knowledge is obtained. As the collant temperature of combustion chamber head is decreased, torque, volumetric efficiency and brake specific fuel consumption have been increased. When coolant temperature of combustion chamber lower, THC emission increased but CO and $NO_x$ emission decreased.

An Investigation of Combustion Emission Characteristics of Kerosene Fan Heater with Addition of Water Droplets by Ultrasonic Atomizer (초음파 수첨가 연소에 의한 석유 홴 히터의 배기가스 특성 고찰)

  • Kim, J.K.;Jeong, K.J.
    • Journal of Power System Engineering
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    • v.3 no.3
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    • pp.44-53
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    • 1999
  • This study is concerned with the emission characteristics of kerosene fan heater, which is burned with kerosene and water droplets simultaneously in the burner, in order to prohibit the emissions of harmful exhaust gas and reduce smell caused by incomplete combustion, and the addition of water droplets to the conventional kerosene fan heater was performed by ultrasonic atomizer. For the investigation of this study, the measurement of exhaust gas components and exhaust gas temperature was carried out by using an automatic combustion gas analyser and $NO_x$ analyser, and the measurement of consumption weight of oil and water was obtained by using electric digital balance. Consequently, according as the water percent weight ratio of about $21{\sim}23%$ was supplied for this study, it was found that the combustion-generated $NO_x$ and CO emissions were reduced very largely, but the emissions of $O_2\;and\;CO_2$ and the temperature of exhaust gas were not changed.

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Prediction for Heat Transfer Characteristics of Supercritical Kerosene Using Mixture Surrogate (대체 혼합물을 이용한 케로신의 초임계 열전달 특성 예측)

  • Lee, Sanghoon;Yang, Inyoung;Park, Boo-min;Lee, Jinhee
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2017.05a
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    • pp.294-296
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    • 2017
  • In this study heat transfer characteristics of kerosene at supercritical condition was predicted. And a sample heat transfer calculation was performed using this result. The prediction was done by assuming kerosene as a mixture of a number of pure substances, and combining the thermodynamic properties of them, using NIST SUPERTRAPP. A regeneratively cooled supersonic combustor will be desinged using the resultant thermophysical property data of supercritical kerosene. Comparing with the combustion test results of the regenerative cooling combustor, the predicted thermophysical property data will be verified.

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Thermal Effects in the Pool Fire of Fuels(I) (석유류 POOL FIRE에 있어서의 열적인 영향(I))

  • 정국삼;강민호;이덕영
    • Journal of the Korean Society of Safety
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    • v.11 no.1
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    • pp.75-83
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    • 1996
  • This paper was concerned with pool fire about many used kerosene and diesel oil. In order to know the thermal effects of kerosene and diesel oil, temperature change in the pool fire of these fuels were obtained as a variation of combustion time and the tank's height and diameter by using the data acquisition system, And fuel combustion velocity were derived as a function of the diameter and wall thickness of tanks and combustion time. As a result, when the tank's height was 15㎝, the greater diameter the higher temperature rising regardless of tank's wall thickness and fuels. But, when the tank's height is 30㎝, temperature rising was not higher than 15㎝. Also, temperature rising in the pool fire of kerosene much higher than diesel oil. Kerosene's combustion velocity was about two times faster than diesel oil. And, kerosene's combustion velocity was increased according to the increasing of tank's diameter and combustion time. But, diesel oil's combustion velocity was a little increased or not. Surrounding temperature change of tank with the pool fire was obtained temperature distribution of 0∼35℃ according to the change of tank's diameter and distance from the tank's wall.

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A Basic Study on the Recovery of Copper, Lead, and Zinc Minerals (동(銅), 연(鉛), 아연광물(亞鉛鑛物)의 회수(回收)에 관(關)한 기초적(基礎的) 연구(硏究))

  • Lee, Jai-Jang
    • Journal of Industrial Technology
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    • v.1
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    • pp.35-38
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    • 1981
  • The conclutions arrived at as a result of experimental work are as follow; 1. The use of kerosene as a collector was found essential to produce a good recovery of chalcopyrite, galena and zincblende under the condition of high pH(below 2). 2. Temperature doesn't seemingly effect the flotation of chalcopyrite, galena and zincblende. 3. The minimum concentration of kerosene as a collecter was 26mg kerosene per liter of solution.

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Experimental study on self-sustaied $1kW_e$ liquid fuel reforming operation (자립형 $1kW_e$ 액체 연료 개질기 운전에 관한 연구)

  • Yoon, Sang-Ho;Bae, Gyu-Jong;Bae, Joong-Myeon
    • 한국신재생에너지학회:학술대회논문집
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    • 2008.05a
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    • pp.503-506
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    • 2008
  • Liquid hydrocarbon fuels, such as gasoline, kerosene, diesel and JP 8, can be good candidates for SOFC (solid oxide fuel cell) system fuel due to their high hydrogen density. Autothermal reforming (ATR) is suitable for liquid hydrocarbon fuel reforming because oxygen can decompose the aromatics in liquid fuel and steam can suppress the carbon deposition during catalytic reaction. The advantage of ATR is that it has a simple system construction due to exothermicity of ATR reaction. We control the exothermicity of reaction, make the reaction possible design a self-sustaining ATR reactor. A self-sustained 1kW-class kerosene autothermal reformer is introduced in this paper. The 1kW-class kerosene reformer was continuously operated for about 140 hours without degradation of reforming performance.

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Numerical Study on the Effect Recess on the Turbulent Combustion of Kerosene/LOx Coaxial Rocket Injector (케로신-산소 로켓 동축 분사기 난류 연소에서 리세스의 영향에 대한 수치해석)

  • Choi, Jeong-Yeol;Shin, Jae-Ryul
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2011.11a
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    • pp.92-95
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    • 2011
  • A multi-step quasi-global mechanism is developed for the kerosene/oxygen combustion analysis including dissociation products. Reaction constants of the global reaction are determined to have agreement with experimental data. The mechanism is used for the numerical analysis of the combustion flow field of the kerosene/oxygen shear coaxial injector. The results from high-resolution numerical analysis confirmed qualitatively that the recess enhance the fuel/air mixing and combustion efficiency by the increased flow instabilities.

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Thermal Properties and Spray Characteristics of Kerosene Fuel at High Temperature and Pressure (고온고압 환경에서 케로신 연료의 물성치변화 및 분무특성연구)

  • Byeon, Yong-Woo;Son, Min;Koo, Ja-Ye
    • Journal of ILASS-Korea
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    • v.15 no.2
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    • pp.94-99
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    • 2010
  • The object of this investigation is to study the thermal properties and spray characteristics of kerosene fuel in high temperature and pressure conditions. In order to investigate the thermal properties and spray characteristics, KIVA3 and SUPERTRAPP have been used at the same time. The thermal properties of kerosene has been calculated in high temperature and pressure condition using SUPERTRAPP. The study of spray characteristics has been conducted at both original properties of KIVA3 and calculated properties. The evaporation rate was increased in proportion to pressure when the calculated properties were used. However, the effect of pressure was not shown in the case of using original properties. So the calculated properties are more effective than original properties in high temperature and high pressure condition.