提出了射流影响区的概念 ,利用图像处理方法和统计方法研究了二维流化床内水平射流在射流影响区出现的概率。射流在射流影响区中间出现的概率较大 ,在两侧出现的概率较小 ,且最大概率点随高度的增加向远离喷嘴的方向发展。研究了流化数和射流气体速度对射流区范围的影响 ,当流化数和射流气体速度增加时 ,射流影响区的范围将扩大。当射流气体速度较大时 ,气泡运动对射流影响区范围的影响减弱。给出了射流影响区加权中心线的关联式 The concept of jet influence zone is put forward. The probability of horizontal jet in two-dimensional fluidized bed in jet influence zone is studied by using image processing method and statistical method. The probability of jets emerging in the middle of the jet influence zone is larger, and the probability of jet jets occurring on both sides is smaller, and the maximum probability point develops away from the nozzle as the altitude increases. The influence of the number of fluidization and the velocity of the jet gas on the jet zone is studied. When the number of jet streams and jet gas velocity are increased, the jet influence zone will be expanded. When the jet velocity is high, the effect of bubble motion on the jet influence area is weakened. The correlation of weighted centerline of jet influence area is given