• Title/Summary/Keyword: 연료유량측정법

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OH-and CH-Radical Chemiluminescence Characteristics in the Spray Combustion of Ultransonically Atomized Kerosene (초음파에 의해 무화된 케로신 분무연소에서의 OH 라디칼 및 CH 라디칼 자발광 특성)

  • Kim, Min Cheol;Kim, Jeong Soo
    • Journal of the Korean Society of Propulsion Engineers
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    • v.22 no.1
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    • pp.72-79
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    • 2018
  • An experimental study was performed to investigate the chemiluminescence characteristics in the spray combustion of ultransonically atomized kerosene. The radical intensity of the spray flame was measured using an ICCD camera and the amount of fuel consumed was obtained by a precise flow-rate measurement technique during combustion. Fuel consumption increased linearly with the increase in carrier-gas flow rate, and typical group combustion, which is a characteristic of spray combustion, was observed. It was found from the analysis of chemiluminescence that the maximum emission intensities of OH and CH radicals decrease, and they move downstream resulting in the increase in a vivid reaction zone as the spray flow rate increases.

Effects of Ultrasonic Standing Wave on the Ultrasonically-atomized Aerosol Flame Injected through a Slit-jet Nozzle (Slit-jet 노즐을 통과한 초음파 무화 에어로졸 화염에 정상초음파가 미치는 영향)

  • Ahn, Hyun Jong;Kang, Yun Hyeong;Kim, Jeong Soo
    • Journal of the Korean Society of Propulsion Engineers
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    • v.24 no.6
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    • pp.53-60
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    • 2020
  • In liquid-fuel spray combustion, an experimental study was conducted to observe the effect of ultrasonic excitation on the ultrasonically-atomized liquid fuel flame by controlling pressure field through an ultrasonic standing wave. Flame of the ultrasonically-atomized kerosene aerosol was visualized by using a high speed camera, DSLR, and Schlieren photography. The amount of fuel consumed was obtained by a precise flow-rate measurement technique during combustion, through which the ratio of carrier gas (air) to fuel mass was able to be obtained, too. As a result, it could be found that the combustion reaction-rate of the liquid-fuel aerosol was increased by applying an ultrasonic standing wave to the secondary flame zone of the flame.

The Study on the improvement of vehicle fuel economy test method according to the characteristics of test fuel (시험용 연료 특성에 따른 자동차 연비측정 방법 개선에 관한 연구)

  • Lee, Minho;Kim, Jeonghwan
    • Journal of Energy Engineering
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    • v.23 no.4
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    • pp.9-18
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    • 2014
  • These test methods, the current domestic vehicles fuel economy calculation method is tested on a dynamometer for vehicles after you have installed the vehicle, given the test mode(FTP-75 & HWFET mode, etc.) are measured by vehicle emissions and fuel economy by seeking to have the results approach, the carbon balance method. At this point, using the carbon balance method is a test method was developed seeking fuel for a standard fuel properties, where the value of the constant and saved test was measured in THC, CO, $CO_2$ has a value calculation. Therefore, use fuel which is changed every time you test the fuel properties characteristics are not considered exactly. In this study, using the carbon balance method and fluid flow rate of the fuel used in the actual test is measured by comparing the results with the flow measurement methods, properties of the fuel used for the test attribute to study ways that can be considered, taking into account the physical attributes of a more diverse fuel line and fuel economy improved measurement methods that can be reviewed.