Heat transfer enhancement in tubes is widely applied various industrial processes. The traditional method of heat to insert radial fins expand the internal surface area and destroy flow. However, there a flue gas corridor central tube, cost expanding inner fin high. A centrally symmetrical bent extruded aluminum was developed enhance tube. An experimental platform constructed test performance f...

The self-tightening technology of body tube is to apply a certain pressure in the inner bore so that corresponding residual stress generated tube, and can improve situation when it use extend its service life. Most existing research for large-caliber artillery are simplified thick-walled cylinder model, ignoring internal rifling chrome-plated processing factors, impact load on cracks stresses s...

Concentrating collectors are also known as focusing collectors. A parabolic trough is a type of concentrating collector in which the energy from the sunlight is reflected and focused on the absorber tube. This paper focused on the performance of parabolic trough collector which has a ceramic-Metal coating on the absorber tube. A comparison of performance has made between with and without coatin...

This study presents a series of shock-tube tests conducted on structural panels using ammonium nitrate fuel oil (ANFO) as the explosive. The characteristics blast waves propagating through shock tube were analyzed by measuring pressure generated at specific locations inside tube. extent differences in confined space, such tube, was compared to that predicted proposed method Unified Facilities C...

OBJECTIVE A cadaver-based study was carried out in order to describe the pulmonary drainage surgical technique, to determine whether the site for the insertion of the chest tube is appropriate and safe, and to determine the anatomical relationship of the chest tube with the chest wall, lungs, large blood vessels, and mediastinum. METHODS Between May and November of 2011, 30 cadavers of both g...

Experiments on the flow boiling heat transfer of almost pure CO2 and CO2-oil mixtures in horizontal smooth and micro-fin tubes have been carried out. The smooth tube is a stainless steel tube with an inside diameter of 3mm, and the micro-fin tube is a copper tube with a mean inside diameter of 3.04mm. Experiments were carried out at mass velocities from 190 to 1300kg/(ms), saturation temperatur...