为了分析或推算锅炉除尘器厂家除尘器布袋的捕集性能，需要知道作用在粉尘颗粒上捕集力的形式、大小和方向，包括粉尘颗粒在运动方向上运动要克服的气流摩擦阻力。
In order to analyze or calculate the trapping performance of precipitator bag in a boiler precipitator, we need to know the form, size and direction of the trapping force acting on the dust particles, including the airflow frictional resistance to overcome the movement of dust particles in the direction of movement.
与此同时，还要知道运载粉尘颗粒的流体特性和运动方程，以便建立粉尘颗粒的运动方程。
At the same time, we should also know the fluid characteristics and motion equations of carrying dust particles in order to establish the motion equations of dust particles.
进而求解出粉尘颗粒的捕集速度和粉尘颗粒的运动轨迹。根据第二章对流场中粉尘颗粒的受力分析，已经建立起了粉尘颗粒的运动方程。
Then the capture velocity of dust particles and the trajectory of dust particles are solved. According to the second chapter of the force analysis of dust particles in the flow field, the motion equation of dust particles has been established.
考虑到各种形式的作用力对粉尘颗粒运动所作贡献的不一样，特进行如下基本假设。
In view of the different contributions of various forms of force to dust particle motion, the following basic assumptions are made.
由于，则可以忽略粉尘颗粒受到的浮力的作用。粉尘颗粒相对于流体的加速度不是很高，故不考虑虚拟质量力。
As a result, the effect of the buoyancy of dust particles can be ignored. The acceleration of dust particles relative to the fluid is not very high, so the virtual mass force is not considered.
忽略热流力的作用，只有当流场内存在巨大的温度梯度场时，热流力tFr的作用才比较重要。本锅炉除尘器厂家除尘器布袋是在常温下运行，可以认为温度场是均匀的。
Neglecting the effect of heat flow, the effect of heat flow force tFr is more important only when the flow field is in a large temperature gradient field. The dust collector bag of the dust collector of the boiler is operated at normal temperature, and it can be considered that the temperature field is uniform.
