2 micrometer-waveband laser ignition device and method

A laser ignition and laser technology, applied in the laser field, can solve the problems of restricting LIPI engineering application, ignition laser system volume, power consumption burden, etc., and achieve the effect of improving ignition success rate, reducing high requirements and increasing safety.

Active Publication Date: 2019-05-10
HARBIN ENG UNIV
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  • Claims
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Problems solved by technology

This will undoubtedly cause a heavy burden on the volume and power consumpt...

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  • 2 micrometer-waveband laser ignition device and method
  • 2 micrometer-waveband laser ignition device and method

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Embodiment Construction

[0019] The present invention will be described in more detail below in conjunction with the accompanying drawings.

[0020] A 2μm band laser ignition device and ignition method, including: a laser preheating device and a laser ignition device, the preheating device is divided into a detection part and a heating part.

[0021] The preheating and ignition part uses the set optical path to focus the laser so that it reaches the test chamber.

[0022] The detection part includes a schlieren device and an infrared temperature measuring device.

[0023] The detection part in the preheating device can use the schlieren method to record the temperature caused by water absorption, and the components included include high-brightness LED lights, convex lenses, concave lenses, apertures, and high-speed CMOS.

[0024] The detection part and the infrared temperature measurement part in the preheating device use a non-contact infrared thermometer to monitor the temperature of the preheating...

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Abstract

The invention discloses a 2 micrometer-waveband laser ignition device and method, and belongs to the technical field of laser. The ignition method comprises two stages, and at the first stage, a Ho:YAG laser of the waveband through self help, and fuel is preheated; at the second stage, a stable and high-energy 1064 nm laser is adopted for ignition. A preheating device comprises a heating part anda detecting part. According to the detecting part, a high-brightness LED lamp, a convex lens, a concave lens, a diaphragm and a plane mirror are used for setting up an imaging system, by means of an experimental combustion sealed chamber and a high-speed CMOS, the heat distribution condition of vapor at the preheating stage is recorded through a schlieren method, and the temperature of fuel is monitored through an infrared thermometer. According to the heating part, the Ho:YAG laser is firstly used for focusing two laser beams at the output end through the concave lens and the convex lens, fuel is preheated on the waist thinning portion, and after the monitoring temperature is reached, ignition is carried out through the high-power Nd:YAG of 1064 nm. The success rate of ignition is greatlyincreased, meanwhile, the minimum ignition energy is reduced, and engine ignition at a lean-burn state is achieved.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a 2 μm band laser ignition device and an ignition method. Background technique [0002] Combustion is an important source of energy and power required for human production and life. With the acceleration of the industrialization process, the available reserves of non-renewable energy such as coal, oil, and natural gas have decreased sharply, and by-products such as greenhouse gases, nitrogen oxides, and particulate matter produced by combustion have also caused serious disasters such as the greenhouse effect, ozone hole, and acid rain. Environmental problems have seriously affected the earth's environment and human life. Therefore, how to improve the combustion efficiency of the combustion system and reduce the emission of pollutants has become an important topic in the field of combustion science. [0003] Studies have shown that the temperature of the lean-burn rea...

Claims

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Application Information

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IPC IPC(8): F02P23/04F02M31/04F02M37/00F02M25/025
Inventor 李立杨乐乐张子建杨晓涛谌绍天贺彦博刘晓楠姜子印穆彦龙
Owner HARBIN ENG UNIV
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