1·A 3-d mathematical model, which is solved by SIMPLER algorithm, to describe the flow and heat trans fer in a wellbore is developed.
本文提出了一个描述井内流动和传热的三维数学模型，用SIMPLER方法获得了该数学模型的数值解。
2·The higher the temperature and the longer the resident time was, the higher the oligomer content was during polyester melt trans - fer course at a fixed screw rotation speed.
在一定的螺杆转速下，温度越高，停留时间越长，聚酯熔体输送过程中齐聚物含量越高。
3·So, the co-carbonization mechanism mainly involves the short alkyl side chain and hydrogen trans-fer reaction between LDOHF and MCTP during pyrolysis and condensation of LDOHF.
共炭化作用的机理主要为共炭化剂的短烷基侧链转移和在热解及聚合时生成氢自由基的氢转移作用。
4·In view of the poor heat transfer conditions of the cylinder ina small air compressor, a scheme is put forward for reinforcing heat trans-fer of cylinder by latent heat of vaporization.
本文针对小型风冷压缩机气缸换热条件较差问题，提出利用汽化潜热对气缸强化换热的方案。