In order to improve the performance of the conventional segmental baffle heat exchanger's heat transfer, a new type of baffle heat exchanger, namely a spherical baffle heat exchanger was proposed. Numerical analysis models for the spherical baffle heat exchanger which radius of curvature was 0.75D and conventional segmental baffle heat exchanger were established and the distribution of the shell side fluid flow field and the shell side pressure drop and the coefficient of heat transfer were obtained. The results indicate that under the conditions of the same structure parameters and the inlet flow velocity, shell side pressure drops cause by the spherical baffle heat exchanger were lower by8%～11% than those caused by the conventional segmental baffle, while the shell side heat transfer coefficient was decreased by 1%～5% compared with the spherical baffles. 

The phenomenon of the oilwater two phase mixed flow is often encountered in the gathering and transportation pipeline, and the study of its pressure variation is important for the gathering pipeline design and operation. Using VOF model to simulate numerically the oilwater two phase flow in bend duct of oilfield surface gathering pipe under different moisture content of crude oil and fluid velocity. Through the analysis of the calculation results, it was known that the moisture content of two phase flow and flow velocity has great influence on the pressure drop in bend duct. With the increase of moisture content, the two phase flow pressure in bend duct increases.The elbow inner wall pressure is reduced while the speed increases, the outer wall of the pressure increases while the rate decreases. While increasing the flow rate, the high moisture content of the oilwater two phase pressure drop first decreases and then increases.

Water film lubricated transport of super heavy oil is one of the energysaving technologies in the energy sector. In water film transport of super heavy oil,OFP produces a normalstress to make the water film stay steadily and no eccentrically phenomenon in the pipeline and plays a supporting role. To understand the change of the normalstress of OFP indepth in water film transport of super heavy oil, the effects of OFP to the stability of water film was analyzed through our experiments.The OFP is a viscoelastic liquid as the shear rate decreases and the solubility of OFP reduces gradually, and the normalstress difference also reduces gradually. 