• Title/Summary/Keyword: Kerosene engine

Search Result 193, Processing Time 0.028 seconds

Study on the LP Gas as a Fuel for Farm Kerosene Engine (농용 석유기관의 LPG 이용에 관한 연구)

  • 조기현;이승규;김성태;김영복
    • Journal of Biosystems Engineering
    • /
    • v.22 no.2
    • /
    • pp.189-198
    • /
    • 1997
  • In order to find out the potential of LP gas as a substitute fuel for small fm engine, experiments were carried out with a four-stroke spark-ignition engine which was modified from a kerosene engine mounted on the power tiller. Performance characteristics of kerosene and LP gas engine such as torque, volumetric efficiency fuel consumption rate, brake thermal efficiency, exhaust temperature, and carbon monoxide and hydrocarbon emissions were measured and analyzed under various levels of engine speed and compression ratio. The results were summarized as follows. 1. It showed that forque of LPG engine was 41% lower than that of kerosene engine with the same compression ratio, but LPG engine with compression ratio of 8.5 it was showed similar torque level to kerosene engine with compression ratio of 4.5. 2. Fuel consumption of LPG engine was reduced by about 5.1% and thermal efficiency was improved by about 2% compared with kerosene engine with the same compression ratio. With the incrasing of compression ratio in LPG engine fuel consumption rate decreased and thermal efficiency increased. 3. Exhaust temperature of LPG engine was about 15% lower than that of kerosene engine. Concenrations of emissions from LPG engine was affected insignificantly by compression ratios, and carbon monoxide emissions from the LPG engine was not affected by engine speed so much. The carbon monoxide and hydrocarbon emissions from LPG engine were about 94% and 66% lower than those of kerosene engine, respectively.

  • PDF

Technical Feasibility of Ethanol-Kerosene Blends for Farm Kerosene Engines (에타놀-석유(石油) 혼합연료(混合燃料)의 농용석유(農用石油)엔진에의 이용(利用)에 관(關)한 연구(硏究))

  • Bae, Yeong Hwan;Ryu, Kwan Hee
    • Journal of Biosystems Engineering
    • /
    • v.7 no.1
    • /
    • pp.53-61
    • /
    • 1982
  • As an attempt to reduce the consumption of petroleum resources and to improve the performance of a kerosene engine, a series of experiments was conducted using several kinds of ethanol-kerosene blends under the various compression ratios. The engine used in this study was a single-cylinder, four-cycle kerosene engine having a compression ratio of 4.5. To investigate the feasibility of ethanol-kerosene blends in the original engine, kerosene and blends of 5-percent, 10-percent, and 20-percent-ethanol, by volume, with kerosene were used. And to investigate the feasibility of improving the performance of the kerosene engine, a portion of the cylinder head was cut off to increase the compression ratio up to 5.0 by reducing the combustion chamber volume. Kerosene and blends of 30-percent and 40-percent-ethanol, by volume, with kerosene were used for the modified engine with an increased compression ratio. Variable speed tests at wide-open throttle were also conducted at five speed levels in the range of 1000 to 2200 rpm for each compression ratio and fuel type. Volumetric efficiency, engine torque, and brake specific fuel consumption were determined, and brake thermal efficiency based on the lower heating values of kerosene and ethanol was calculated. The results obtained in the study are summarized as follows: A. Test with the original engine: (1) No abnormal conditions were found when burning ethanol-kerosene blends in the original engine. (2) Volumetric efficiency increased with ethanol concentration in blends. When burning blends of 5-percent, 10-percent, and 20-percent ethanol, by volume, with kerosene, average volumetric efficiency increased 1.6 percent, 2.6 percent, and 4.1 percent respectively, than when burning kerosene. (3) Mean engine torque increased 5.2 percent for 5-percent-ethanol blend, 9.3 percent for 10-percent-ethanol blend, and 11.5 percent for 20-percent-ethanol blend than for kerosene. Increase in engine torque when using ethanol-kerosene blends was due to the improved combustion characteristics of ethanol as well as an increase in volumetric efficiency. (4) Up to ethanol concentration of 20 percent, mean brake specific fuel consumption was nearly constant inspite of the difference in heating value between ethanol and kerosene. (5) Brake thermal efficiency increased 0.3 percent for 5-percent-ethanol blend, 3.8 percent for 10-percent-ethanol blend, and 6.8 percent for 20-percent-ethanol blend than for kerosene. B. Test with the modified engine with an increased compression ratio: (1) When burning kerosene, mean volumetric efficiency, engine torque, and brake thermal efficiency were somewhat lower than for the original engine. (2) Engine torque increased 15.1 percent for 30-percent-ethanol blend and 18.4 percent for 40-percent-ethanol blend than for kerosene. (3) There was no significant difference in brake specific fuel consumption regardless of ethanol concentration in blends. (4) Brake thermal efficiency increased 15.0 percent for 30-percent-ethanol blend and 19. 5 percent for 40-percent-ethanol blend than for kerosene.

  • PDF

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
    • /
    • v.24 no.6
    • /
    • pp.120-125
    • /
    • 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.

An Experimental Study on Engine Performance Characteristic of LPG Engine -Engine Perfermance Character at Various Compression Rations- (LP가스 차량용 기관의 성능특성에 관한 실험 연구 -압축비 변경에 따른 기관성능특성-)

  • 조기현
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.23 no.5
    • /
    • pp.654-661
    • /
    • 1999
  • This is fundamental study to improve performance of the SI engine,. In this study a conven-tional kerosene engine was modified to LPG dedicated engine which can be operated with LPG(Liquefied Petroleum Gas) The modified model were tested in accordance with various compression ratios. Also the engine performance with modified model was compared with the conventional one. The results are sum-marized as follow; 1. In comparison with the conventional kerosene Gasoline engine and LPG dedicated engine can be operated with lower exhaust emission better fuel economy and better thermal efficiency. 2. But is produce a slightly lower brake horse power.

  • PDF

Development of Combustion Test Facility for Liquid Locket Engine (액체로켓엔진 성능 및 냉각특성 연구를 위한 연소시험 장치 개발)

  • Lee Sung-Woong;Kim Dong-Hwan;Kim Young-Soo
    • Proceedings of the Korean Society of Propulsion Engineers Conference
    • /
    • 2004.10a
    • /
    • pp.189-192
    • /
    • 2004
  • Test Facility for hot firing test of small size liquid rocket engine has been developed to research the cooing characteristics of kerosene for cylinder part especially. Propellants for the tests are kerosene and liquid oxygen as fuel and oxidizer respectively and they are fed by gaseous nitrogen. The engine components used hot firing test except for cylinder are cooled by tap-water. Valves for supply of propellants and coolants are controlled by pneumatically. System control and data recording are conducted automatically.

  • PDF

A Case Study on the Design of Kerosene-LOx Liquid-Propellant Rocket Engines for Performance Enhancement (케로신-액체산소 액체로켓엔진의 성능향상 설계안 사례 조사)

  • Lee, Seon-Mi;Moon, In-Sang;Lee, Soo-Young
    • Proceedings of the Korean Society of Propulsion Engineers Conference
    • /
    • 2011.04a
    • /
    • pp.12-15
    • /
    • 2011
  • The most widely used kerosene-LOx liquid-propellant rocket engines in these days have a similar engine schematic to those of the past because of the development cost and the reliability. The efficiency of engines could be increased by the factors such as a cooling method, engine cycles, shape of cooling channels, additional coolant and so on. In this article, it is described that some design ideas for performance enhancement by exchange kerosene with LOx of a coolant.

  • PDF

Estimation Methods for Turbine Nozzle Throat Area Reduction of A LOx/Kerosene Gas Generator Cycle Liquid Propellant Rocket Engine (액체산소/케로신 가스발생기 사이클 액체로켓엔진 터빈 노즐목 면적 변화 추정 방법)

  • Nam, Chang-Ho;Moon, Yoonwan;Park, Soon Young;Kim, Jinhan
    • Journal of the Korean Society of Propulsion Engineers
    • /
    • v.23 no.5
    • /
    • pp.101-106
    • /
    • 2019
  • Carbon deposition on the turbine nozzle throat of a LOx/kerosene gas generator cycle(open cycle) engine causes performance reduction of the engine. Estimation methods for a turbine nozzle throat area are proposed. The discharge coefficient of the turbine nozzle was estimated with the turbine gas properties such as gas constant, specific heat ratio, and temperatures. The pressure ratio and temperature ratio of the turbine nozzle throat, was utilized to estimate the discharge coefficient also. Estimated discharge coefficient of turbine nozzle throat of KSLV-II 1st stage engine shows the carbon deposition effects on the turbine nozzle throat of a LOx/kerosene open cycle engine.

Numerical Study for Kerosene Surrogate Model in Supercritical Swirl Injector (초임계 스월 인젝터에서의 케로신 Surrogate 모델에 대한 수치적 연구)

  • Kim, Kuk-Jin;Heo, Jun-Young;Sung, Hong-Gye
    • Proceedings of the Korean Society of Propulsion Engineers Conference
    • /
    • 2010.11a
    • /
    • pp.19-23
    • /
    • 2010
  • Injection characteristics of a kerosene swirl injector of liquid rocket engine operating at supercritical environment have been investigated. Kerosene surrogate models are proposed to model the kerosene properties. Turbulent numerical model is based on large eddy simulation and contains Soave modification of Redlich-Kwong equation of state and Chung's model. Numerical analysis results at supercritical environment are compared with the one at transcritical condition. Differences of density and viscosity are analyzed at both liquid film and core gas in the swirl injector.

  • PDF

Korean Reusable Launch Vehicle Development Strategy Using SpaceX's Strategy (SpaceX의 전략을 활용한 한국형 재사용 발사체 개발 전략)

  • Lee, Keum-Oh;Lee, Junseong;Park, Soon-Young;Roh, Woong-Rae;Im, Sung-Hyuck;Nam, Gi-Won;Seo, Daeban
    • Journal of the Korean Society of Propulsion Engineers
    • /
    • v.25 no.3
    • /
    • pp.101-112
    • /
    • 2021
  • SpaceX shows various strategies such as constructing various payload portfolio through the reuse of Falcon 9 and Falcon Heavy, constructing the launch vehicles using one type of engine, the transition from kerosene engine to methane engine, and the use of 3D printing. In this study, launch vehicle proposals that can cover a variety of payloads and trajectories from KOMPSAT to GEO-KOMPSAT were constructed, and ten launch vehicles using kerosene gas generator cycle engine, kerosene staged-combustion cycle engine, and methane staged-combustion cycle engine were reviewed. Of the ten launch vehicles, the reusable launch vehicle using a 35-ton methane engine was rated as the best in terms of development potential.

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
    • /
    • v.28 no.1
    • /
    • pp.92-97
    • /
    • 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.