����ĭ��������У����е��������������ܺܺõشﵽ���ݵ�Ŀ�ġ����߽�������������������̨������������ѹ��������������������Ӱ�����飬ͨ�����Բ�ͬѹ���벻ͬ��ת��ȷ��������ѹ���������ʵĹ�ϵ��ͬʱ����FLUENT ���������������ɢ�ܺ����ݹ��ڲ���ѹ���ֲ�����������ֵģ������������ݷ���������������������Ż���ƣ������ݹܵij��ȴ�15 cm ������65 cm���ԸĽ���������������������飬�������ʴﵽ80%���ҡ�

The existing foam breaking device usually can not properly achieve the requirements of defoaming in the process of foam drilling�� The indoor test-bed of foam breaking device was established to do influence test of defoaming pressure to defoaming ability�� The relationship between defoaming pressure and defoaming rate was determined based on testing different pressures and pump revolution speeds��and FLUENT software was used to make numerical simulation and analysis to the pressure distribution inside diffusion and defoaming pipes of foam breaking device�� According to analysis results��the foaming breaking device was optimally designed by increasing the length of defoaming pipe from 15 cm to 65 cm�� The indoor test results indicate that the defoaming rate of modified foam breaking device reached to about 80 %��