Experimental research of FEM based on the grooved pipe;

Rising liquid film on the fluted surface of a horizontal tube forms a low reynold number flow and generally,convection term of Navier-Stokes equation in the governing equations of the numerical model describing the behaviors of the rising liquid film on the fluted surface of a horizontal tube.

Experimental investigation on rising film formation process of binary solution on the fluted helix surface of a horizontal tube was carried out.

An EDM groove machine was used to do some experiments for testing an orthogonal array of.

Two symmetric trough lines must be grooved on the rock wall to realize a diretional rupture according to the stress concentration, and so a pneumatic down-the-hole groover was developed and manufactured.

So,it is significant for improving the traffic safety to present reasonable groove parameters through analyzing and investigating the groove status at home and abroad.

This paper bring forward an experimental method used in testing light weapon pill rotate speed based upon weapon pill and weapon bottom carved slot technology.

With the characteristics of small arms,such as small volume,swift velocity and long route,the bottom carved slot technology of small arms,and RCS,flight stability and measuring accuracy of projectiles were analyzed.