CAJ | 학술논문

研究周期性管排阵列的声传播特性对于检测发生在炉内换热器管阵列中的泄漏故障具有重要意义。该文阐述了周期性管排阵列声传播物理机制。实验研究了周期性管排阵列的声传播特性。得出管阵列的纵向节距、横向节距和管径大小等几何参数对泄漏声辐射透射声谱的影响规律，揭示管阵列纵向节距影响透射声谱的“阻带”位置，横向节距影响透射声谱主极大的位置，以及管径大小影响透射声谱总能量的基本关系。指出充水管阵列与管内为空气的管阵列声透射特性的相同与差异，以及“通带”的位置。为炉内管阵列中的管道泄漏检测技术提供了实验依据。
연구주기성관배진렬적성전파특성대우검측발생재로내환열기관진렬중적설루고장구유중요의의。해문천술료주기성관배진렬성전파물리궤제。실험연구료주기성관배진렬적성전파특성。득출관진렬적종향절거、횡향절거화관경대소등궤하삼수대설루성복사투사성보적영향규률，게시관진렬종향절거영향투사성보적“조대”위치，횡향절거영향투사성보주겁대적위치，이급관경대소영향투사성보총능량적기본관계。지출충수관진렬여관내위공기적관진렬성투사특성적상동여차이，이급“통대”적위치。위로내관진렬중적관도설루검측기술제공료실험의거。
It is important for detection of leakages faults in the boiler heat-exchanger tube array that the transmission characteristics of sound emission in the periodic tube arrays were studied. In this paper, the physical mechanism of sound transmission through any row within the periodic tube array was described. By experimentally studying on the sound propagation characteristics in the periodic tube array, the relationships between geometric parameters of the tube array and the transmission coefficients of leakage sound emission had been obtained. It was revealed that the longitudinal period of tube array would change the stop band frequencies, the transverse period of tube array would change the main maximum frequencies, and the diameter size of the tube would change the sound transmission energy. The sound transmission characteristics of water-filled tube array had been experimentally studied. The same and differences of sound transmission characteristics between water-filled tube array and air-filled tube array were given out, and the pass band frequencies were obtained. This paper provides an experimental basis for the tube leak detection technology in boilers.