• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.11a
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• pp.239-242
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• 2003

자동차 점화장치는 전원으로부터 공급된 낮은 전압을 점화코일을 통하여 연소실의 혼합기를 연소시키기에 충분한 고전압을 발생시키는 장치이며, 점화장치의 핵심은 점화코일이다. 이 점화코일은 절연성능이 우수한 절연재료가 사용되지만 고전압의 발생으로 점화코일 내부에서 일어나는 전기적 열화로 인해 누설전류가 흐르게 되어 전기적 고장을 초래할 수 있다. 이로 인하여 절연재료의 수명은 단축되며, 또한 점화코일에 전류가 흐름으로써 코일 내부에서 발생하는 온도변화에 따른 절연열화로 점화코일의 성능이 저하될 수 있다. 따라서 본 연구에서는 점화코일에 사용되고 있는 절연재료에 전압이 인가될 때 발생할 수 있는 비파괴검사의 일종인 부분방전 측정을 통하여 전압변화에 따른 에폭시 성형 점화코일의 위상각($\Phi$) - 방전전하량(q) - 발생빈도수(n)의 특성 변화를 조사하고 분석함으로써 점화코일의 수명을 예측하여 자동차 점화장치의 성능진단과 정보제공을 자동차 전기장치의 발전에 도움이 될 것을 기대하며, 온도상승에 따른 점화코일의 부분방전 특성을 실험하고 분석하였다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2009.05a
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• pp.57-60
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• 2009

Exothermic and ignition characteristic of igniter is very important factor in engine performance. Since the igniter performance is effected by Hydrogen Peroxide decomposition rate, we have to test the preliminary catalyst performance test. In this report, after making igniter using hydrogen peroxide/kerosene, a thermal characteristic were examined by comparing hydrogen peroxide mass and catalyst mass. And then we study ignition characteristic of the affects of O/F ratio using the previous data.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2010.11a
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• pp.705-706
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• 2010

The design analysis for the ignition transient combustion characteristics of a Kick Motor igniter indicated that the initial pressure condition would delay ignition time within a range from 100 to 500 ms. In the development tests, we confirmed that the igniter could provide the acceptable energy to ignite the main propellant at ignition transient.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.11a
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• pp.737-744
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• 2011

The success of continuous aluminum powder combustion with steam plasma is different from hydrocarbon ignition source. Ignition characteristics of aluminum powder with high temperature thermal plasma is studied with oxidizer-free environment. Experiment with argon plasma has same temperature conditions at 4500 K and particle feeding condition for previous combustion test with steam plasma and swirl combustor. The temperature of the plasma was measured using Optical Emission Spectroscopy method. Ignition characteristics were analyzed by SEM image and EDS. Aluminum powder with plasma has rapid evaporation mechanism contrast to hydrocarbon ignition source. It enhances to aluminum powder effective ignition characteristics.

• Journal of the Korean Society of Propulsion Engineers
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• v.13 no.5
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• pp.48-56
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• 2009

The auto-ignition tests of hybrid rockets with the concentrated hydrogen peroxide as an oxidizer were presented. Auto-ignition was successfully demonstrated by injecting decomposed gases from $H_2O_2$ into paraffin or polyethylene fuels. In addition, restart and instant ignition were realized with this rocket. For stable combustion, a higher $L^*$ value was required for the paraffin combustion compared with PE. On the other hand, much faster response time was demonstrated in case of a paraffin, which was 13 and 30 ms at ignition delay and rise time respectively.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2009.11a
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• pp.499-502
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• 2009

The auto-ignition tests of hybrid rockets with the concentrated hydrogen peroxide as an oxidizer were presented. Auto-ignition, restartability, and instant ignition were successfully demonstrated by injecting decomposed gases from $H_2O_2$ into paraffin or polyethylene fuels. In addition, much faster response time was demonstrated in case of a paraffin, which was 13 and 30 ms at ignition delay and rise time respectively.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.23 no.6
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• pp.24-30
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• 2009

We compared 3 kinds of ignitor characteristics and represented the procedure in order to turn the HID lamp on. Also, we analysed the cable characteristic based on the length between ignitor and the HID lamp and proved it theoretically. In practice, the ignition voltage contains a lot of problems because it is easily changed by the structure of ignitors, cable length and characteristics. In this paper, therefore, 3 ignitors, which are LC resonant typed, arc-gap circuit typed and drive frequency variable typed, have simulated and analysed with the 25[m] cable length. After careful consideration of comparisons made of all the ignitors' and cables' characteristics, a number of possible solutions were finalized.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2008.11a
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• pp.397-400
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• 2008

Traditional propellants which have a hypergolic characteristic have a high performance but also have disadvantages of toxicity and complex handling requirement. In order to replace these propellants, one of the alternatives is hydrogen peroxide which generates high temperature oxygen and water vapor after catalytic reaction. In this paper, autoignition characteristics of kerosene by decomposed hydrogen peroxide were investigated to perform fundamental research for designing a thruster using hydrogen peroxide and kerosene propellants. Contraction ratio, whether flame holder exists or not, and feeding pressure of propellants were selected as variables. From the experiments for different mixture ratio, we confirmed the ignition stability is strongly affected by a feeding pressure of propellants.

• Transactions of the Korean Society of Mechanical Engineers
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• v.16 no.12
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• pp.2376-2384
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• 1992

A theoretical analysis is carried out to predict the characteristics of transient ignition phenomena for the spherical fuel droplets cloud with non-uniform droplet size and number density distribution. Numerical calculations are performed for various cases depending on the combinations of the major parameters such as ambient temperature and initial distributions of droplet size and number density. The results of present study show that the ignition delay decreases for higher ambient temperature and smaller droplet size. Droplets cloud of hollow type with outer concentrated distribution ignites most rapidly.

• Journal of the korean Society of Automotive Engineers
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• v.1 no.1
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• pp.17-20
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• 1979

Transistor식 점화장치는 자동차의 배기 공해대책, 연료저감대책 등의 방안으로 근래에 급속히 발전된 System이다. Transistor 점화장치로 요구되는 배경은 다음과 같다. [1] 화화출력이 커져서 Engine에 있어서 확실한 연소가 기대되고 배기정화책 연료저감책에 유 효하다. [2] 기계적인 접점이 없으므로 장기적으로 Engine의 성능을 일정하게 유지한다. [3] 저회전에서 고회전까지 높고 안정된 화화출력을 갖고 있기 때문에 시동특성 고속특성이 양 호하다. [4] 점화시기제어에 신기능부가가 용이 이와같은 목표를 달성하기 위하여 세계각국의 자동차 Maker는 각각의 독자적인 System 회로방식을 개발하여 Transistor점화장치를 실용화하고 있 으나 우리나라에서는 아직도 자동차에 기계식 점화장치를 사용하여 생산하고 있는 실정이다.