This paper mainly introduces all sorts of means to control total pressure in air cushioned headbox.

In order to study the processing mechanism of BCF, the distribution of total pressure and statical pressure inside and outside the texturing tube are discussed with the help of the pressure probe, and the result of the experiments is analyzed.

Results show that:isolator has little effect on total temperature of the inlet exit;when the length of isolator is shorter,the total pressure of the inlet exit is.

The method can reduce the total compression rate of the finished products and raise intensity and tenacity of it.

The proper cumulative compression ratio can insure the pipe property.

Based on the calculation model of various pressure losses in a positive pneumatic conveying system, a calculation model of total pressure loss in two- phase flow is established in the paper.

Cavity length depth ratio strongly influences flow field、total pressure recovery、drag coefficient.

The static pressure distributions along the duct, distortions of the flow field at the outlet section and total pressure recovery coefficients are measured and analyzed.

The static pressure distributions along the duct,distortions of the flow field at the inlet exit section and total pressure recovery coefficients had been measured and analyzed.

The influence of width-to-pitch ratio (t/p) and width-to-height ratio (t/e) of ribs upon heat transfer and total pressure loss of rectangular grid-ribbed channel was studied experimentally.

The study involves the distribution of total pressure loss factor, outlet gas flow static pressure and Mach number along the blade height.

An experimental investigation has been carried out to reveal the variations of total pressure loss and static pressure recovery with the inner and outer dump angles and the distance between prediffuser exit and the head of the flame tube (i.

Study of staged propagation of circumferential steady total pressure distortion in axial flow compressors;

Analysis of flow loss induced by inlet total pressure distortion in a small fan;

A stage-by-stage simulation method is introduced for analysis of inlet total pressure distortion effect on the multistage axial flow compressor characteristics.

This paper based on the method of computational fluid dynamics,simulated the wind field,analyzed the total pressure differences between windward face and leeward face,and compared these with those of the non-bottom overhead construction of the same width and height.