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中文摘要：
对声学法同时重建锅炉炉膛二维温度场及速度场进行了理论和实验研究。基于炉膛内烟气浓度分布的先验信息,提出了一种温度场声学重建的修正方法,并选取2个工况,对温度场和速度场的同时重建进行了数值模拟。模拟结果表明,修正后的算法可以有效减小重建误差,得到比较精确的重建结果。同时,提出了一种获取声波相位差的高精度测量方法,开发了可用于声学重建的双声波频率测量系统,实测结果也证明了该方法的正确性及精确性。
英文摘要：
Theoretical and experimental studies on simultaneous reconstruction of temperature and flow in a boiler furnace were carried out.On the basis of the transcendental information of the gas mixtures＇ concentration distribution in the combustion chamber,a correction method was proposed to improve the accuracy of temperature reconstruction.Numerical simulation was performed in two cases,which shows good results of the reconstructed temperature and velocity.The result shows the modified algorithm can reduce the reconstruction error effectively and obtain a more accurate reconstruction result.Moreover,an acoustic measuring system has been established and the validity and accuracy of this system have been proved.
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