CAJ | 학술논문

对锅炉炉膛冷态和热态声场进行了分析,从理论上对广义互相关时延估计及其加权函数进行了深入探讨,并在国内某300MW机组上安装声学测点,对不同的加权函数进行了冷态和热态试验研究.结果表明：广义互相关时延估计法可以用于声学测温中声波飞渡时间的测量;PHAT加权具有抗混响能力,能在锅炉冷态混响环境下得到准确的时延估计;ML加权具有很好的抗噪能力,能在锅炉热态时得到准确的声波飞渡时间.
대과로로당랭태화열태성장진행료분석,종이론상대엄의호상관시연고계급기가권함수진행료심입탐토,병재국내모300MW궤조상안장성학측점,대불동적가권함수진행료랭태화열태시험연구.결과표명：엄의호상관시연고계법가이용우성학측온중성파비도시간적측량;PHAT가권구유항혼향능력,능재과로랭태혼향배경하득도준학적시연고계;ML가권구유흔호적항조능력,능재과로열태시득도준학적성파비도시간.
Sound field in boiler furnace was analyzed at both cold and hot state,while the time delay estimation（TDE） based on generalized cross-correlation（GCC） and related weighting functions studied theoretically.Acoustic pyrometers were installed in the boiler furnace of a domestic 300 MW unit,with which cold-and hot-state experiments were carried out using different weighting functions.Results show that the GCC-TDE method may be used for measurement of sound travel-time by acoustic technology.The GCC-TDE method weighted by PHAT can suppress sound reverberation,which may therefore help to obtain accurate TDE in cold-state reverberation conditions of boiler;whereas the method weighted by ML is suitable for measurement of sound travel-time in hot-state conditions,due to its robust anti-noise capability.