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Device and method for simultaneously measuring flame shape and temperature

A technology of synchronous measurement and flame, which is applied in the field of optical detection and transient combustion process monitoring, can solve the problem of high measurement repetition frequency, and achieve the effect of simple construction, fast speed and high accuracy

Active Publication Date: 2020-04-28
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantage is the high measurement repetition rate (approximately kHz), the disadvantage is the path integration measurement

Method used

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  • Device and method for simultaneously measuring flame shape and temperature
  • Device and method for simultaneously measuring flame shape and temperature

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Embodiment Construction

[0029] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but only to illustrate the essence of the technical solution of the present invention.

[0030]In the following description, for the purposes of explaining the various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment may be practiced without one or more of these specific details. In other instances, well-known devices, structures and techniques associated with the present application may not have been shown or described in detail in order to avoid unnecessarily...

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Abstract

The invention discloses a device and a method for measuring flame form and temperature synchronously. According to the method, the transient flame form is detected with high-speed schlieren, and the flame temperature is detected with TDLAS (tunable diode laser absorption spectroscopy); detection zones of the high-speed schlieren and the TDLAS are focused in the same detection zone in a constant-volume combustion bomb respectively, the high-speed schlieren and the TDLAS are controlled synchronously by a digital delay generator, and synchronous detection for the flame form and temperature in thetransient flame propagation process is realized. The device comprises the visual constant-volume combustion bomb, a light source, a pinhole diaphragm, an achromatic Fourier transform lens, an adjustable diaphragm, a high-speed camera, a laser, a laser driver, a function generator, an etalon, a reflector, a photoelectric detector, a data acquisition unit and the like. According to the device and the method, the problem about synchronous measurement for the transient flame form and temperature is solved, the clear flame form is obtained with the high-speed schlieren, the high-temporal-resolution flame temperature is obtained with the TDLAS, and combustion characteristics of transient flame are researched through combination of two results of the flame form and temperature.

Description

technical field [0001] The invention relates to the field of optical detection, in particular to the application of a synchronous measurement method combined with high-speed schlieren technology and TDLAS technology in the field of transient combustion process monitoring. Background technique [0002] The internal combustion process of the engine converts the chemical energy in the fuel into heat and mechanical energy, providing the main power of the current human society. Improving engine combustion efficiency and reducing pollutant emissions have always been the unremitting pursuit of scientific research and industrial production. The internal combustion of the engine is a transient process, and its time scale is usually on the order of milliseconds. In order to simulate the transient combustion process inside the engine on this time scale and study its combustion efficiency and pollutant generation, well-known domestic and foreign institutions such as Tsinghua University...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/00G01N21/39G01B11/00G01B11/24
CPCG01B11/00G01B11/24G01K11/003G01K11/006G01N21/39
Inventor 王国情齐飞刘训臣张国勇李玉阳
Owner SHANGHAI JIAOTONG UNIV
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