A measuring device suitable for two-dimensional reconstruction of gas in combustion flow field

Abstract

The invention discloses a multi-optical path and multi-angle measuring device suitable for two-dimensional reconstruction of gas in a combustion flow field. Including electric control rotation stage, electric control translation stage, laser transmitting and receiving end surface, laser coupler, multi-channel data acquisition card, laser controller, translation stage controller, etalon, laser, detector, computer. The measurement device adopts all-fiber transmitting and receiving, and the two ends of the laser transmitting and receiving end face are respectively fixed on two electronically controlled translation platforms, so that the maximum measurement area of ​​the device is 350mm×350mm, and the minimum adjustable translation distance is 1mm. The bottom end of the translation platform is fixed on the electric control rotation platform, so that the entire measuring device can perform 360° rotation measurement, and the minimum adjustable rotation angle is 1°. The laser controller is used to control the output wavelength of the laser, the etalon is used to calibrate the laser frequency, the detector converts the collected optical signal into an electrical signal, and transmits it to the data acquisition card for processing. The entire device has a wide measurement range and high measurement accuracy, and can realize two-dimensional measurement of high-temperature combustion flow fields.

Description

technical field [0001] The invention belongs to the technical field of flow field optical measurement, relates to tunable semiconductor laser absorption spectrum technology, and is a universal and reliable measurement device developed for two-dimensional reconstruction of combustion flow field gas. Background technique [0002] With the continuous development of aerospace technology and the increasing demand for national defense construction, engine combustion flow field diagnosis and performance evaluation have received more and more attention. The efficient combustion flow field measurement method can provide an important reference for improving the combustion efficiency of the engine. Traditional flow field measurement mainly uses contact measurement methods, such as pneumatic velocity probes, gas sampling probes, thermocouple temperature probes, etc. Contact measurement has disadvantages such as high maintenance cost, high failure rate, slow response speed, inconvenient...

AI Technical Summary

Problems solved by technology

Due to the limitation of hardware conditions in the experiment, the rotation angle is 90 degrees, which makes the error of the reconstruction result larger

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