0 IntroductionThe transporting actuating medium of coal-powder ventilators used in thermalpower plants is dual phases,i.e.consisting of gas and solid coal-powder particles.Be-cause of the existing of solid particles,the wear problem of ventilators of this kind isvery serious.So it is an important way to increase ventilators wearability and prolongtheir using lives to study the effect of solid particles on wear and preventing measures.
The boundary element method is a new type of numerical method. The main advantage of the method is the reduction by one of the dimensionality of the problem under consideration. Thus considerable savings in the data input and computer CPU time required to run it can be achieved.
