CAJ | 학술논문

为了构造增强型驻波声场分离烟气颗粒，设计了一种具有对称Helmholtz声源的圆柱形波导驻波增强发生装置．以柱腔的谐振频率作为Helmholtz共振器的共振频率制作声源，通过理论和实验研究了该装置柱腔的共振频率随谐振阶数的变化、驻波的时空变化和声能分布，比较了有无Helmholtz声源装置驻波的时空变化，并通过实验展示了烟气颗粒在装置中的分布特征．结果表明：装置运行在设计频率时能够实现共振；一对相反相位Helmholtz声源在柱腔内产生了强驻波，在相同条件下，其强声场区的最大声压幅值是同相位的2．75倍，是无 Helmholtz 声源时的13．3倍，使烟气颗粒产生了聚散性分离．该装置具有结构简单、驻波品质高、声压强度大等优点，因而可广泛用于烟气颗粒分离．
위료구조증강형주파성장분리연기과립，설계료일충구유대칭Helmholtz성원적원주형파도주파증강발생장치．이주강적해진빈솔작위Helmholtz공진기적공진빈솔제작성원，통과이론화실험연구료해장치주강적공진빈솔수해진계수적변화、주파적시공변화화성능분포，비교료유무Helmholtz성원장치주파적시공변화，병통과실험전시료연기과립재장치중적분포특정．결과표명：장치운행재설계빈솔시능구실현공진；일대상반상위Helmholtz성원재주강내산생료강주파，재상동조건하，기강성장구적최대성압폭치시동상위적2．75배，시무 Helmholtz 성원시적13．3배，사연기과립산생료취산성분리．해장치구유결구간단、주파품질고、성압강도대등우점，인이가엄범용우연기과립분리．
For the purpose of generating enhanced acoustic standing wave field to separate particles in smoke,a new device with symmetrically arranged Helmholtz sound sources (HSSs)was de-signed.The resonance frequency of the cylindrical cavity was used as resonance frequency of HSS. The resonance frequency variation of the cylindrical cavity with the change of resonant orders,the temporal-spatial variation of standing wave and the acoustic energy distribution along axis were theo-retically and experimentally researched.The comparison of the temporal-spatial variation of standing wave of the devices with and without HSSs were carried out,and the distribution of particles in smoke in the cylindrical cavity were also studied.The results show that the resonance of the device can occur when operating at the designed frequency.The HSSs operating in opposite phases can gen-erate the enhanced acoustic standing wave field.Under the same conditions,the maximum pressure amplitude in the response magnified area is 2.75 times that caused by the HSSs operating in same phase and 1 3 .3 times that caused by the general sound sources.Aggregation-dispersion of particles in smoke is realized.The device has simple structure,high quality of standing wave and strong strength of sound pressure and can be widely used in the field of particles separation in smoke.