认为当分离器外旋流中损耗的能量(即外旋流向内旋流传递的总能量)与内旋流旋转能量达到平衡,即内外旋流之间能量的传递达到稳定状态时,旋转气流到达旋涡尾端位置.由此,采用分离器内压降定量表征能量的损耗,推导得到旋风长度的计算公式.考察了排气管直径、入口尺寸、排气管插入深度、入口浓度、分离器长度、排尘口直径等因素对旋风长度的影响.将该公式计算结果与实验测量值进行对比,结果表明,该公式能较好地反映各因素对旋风长度的影响趋势,且数值差别较小.该公式通过旋风分离器能量传递的特性推导,具有明确的物理意义,适用性较强.%It was suggested that when the energy lost in the outer vortex (the overall energy transferred from outer vortex to inner vortex) and the rotation energy of the inner vortex reached equilibrium, the energy transfer between the inner and outer vortex reached a stable, and the vortex end could be obtained. Then, a calculation equation of the vortex length was obtained based on the analysis of the energy lost in the cyclone. The effects of the inlet dimension, vortex finder diameter, vortex finder length, cylinder length, dust outlet diameter, inlet concentration on the vortex length were investigated. In addition, the calculated and the measured vortex lengths were also compared. The results indicated that the equation could predict the effect tendency of the factors to vortex length, and the accuracy was generally satisfactory. The equation obtained through the investigation of the energy transfer possessed certain physics principle with strong adaptability.
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