CAJ | 학술논문

为探究烟气中固体颗粒对螺旋槽管束的磨损行为，应用离散相模型对烟气横掠顺列螺旋槽管束进行气固两相流动的数值模拟，并通过用户自定义函数引入新的磨损计算模型。分析了飞灰颗粒对光管和螺旋槽管磨损的差异以及烟气流速、粒径、横向/纵向管距和螺距、槽深等因素对螺旋槽管磨损的影响。结果表明：相同工况下，螺旋槽管管束磨损率比光管管束小10％左右；磨损率随烟气流速、颗粒直径、纵向管距的增大而增大；小粒径颗粒（dp ＝25μm）最大磨损位置发生在圆心角30°左右，较大粒径颗粒最大磨损位置发生在圆心角40°左右；磨损率随横向管距、螺距、槽深的增大而减小；槽深对螺旋槽管磨损率的影响远低于螺距的影响。
위탐구연기중고체과립대라선조관속적마손행위，응용리산상모형대연기횡략순렬라선조관속진행기고량상류동적수치모의，병통과용호자정의함수인입신적마손계산모형。분석료비회과립대광관화라선조관마손적차이이급연기류속、립경、횡향/종향관거화라거、조심등인소대라선조관마손적영향。결과표명：상동공황하，라선조관관속마손솔비광관관속소10％좌우；마손솔수연기류속、과립직경、종향관거적증대이증대；소립경과립（dp ＝25μm）최대마손위치발생재원심각30°좌우，교대립경과립최대마손위치발생재원심각40°좌우；마손솔수횡향관거、라거、조심적증대이감소；조심대라선조관마손솔적영향원저우라거적영향。
To investigate the erosion of spirally corrugated tubes produced by solid particles in flue gas,numerical simulation was performed applying the discrete phase model to predict particles trajec-tory while flue gas flowing across spirally corrugated tubes in aligned arrangement.And a new relia-ble erosion calculation model was introduced through the user-defined functions.Differences of ero-sion characteristics between smooth tubes and spirally corrugated tubes caused by particles were ana-lyzed.Effects of the flue gas velocity,particle diameters,transverse space,longitudinal space, pitch and groove depth on the erosion characteristics were also discussed.The results show that the erosion rate of spirally corrugated tubes is decreased about 10%compared to that of smooth tubes un-der the same conditions.With the increase of the flue gas velocity,particle diameters and transverse space,the erosion rate increases.The most serious wear point occurs at the central angle of 30°for smaller diameter particles(dp=25 μm)and 40°for larger particles.The erosion rate decreases with the increase of the longitudinal space,pitch and groove depth.The influence of the groove depth on the erosion rate is far less than that of the pitch of spirally corrugated tube.