The high-speed partial emission pump is a small flow and high-head pump, which has been widely used. To study the main factors affecting the performance of high-speed partial emission pumps, numerical simulation methods were used to calculate the performance parameters of high-speed partial emission pumps with and without inducers, and the external characteristic parameters were verified through comparison test values. The results show that the head of the high-speed partial emission pump with inducer is nearly 15 m higher than that of the high-speed partial emission pump without inducer. Considering the influence of air in the high-speed partial emission pump on the working performance, the two-phase flow with different flow rates, different particle sizes, and different concentrations was calculated, and the different liquid phase distributions, liquid phase velocity vector diagrams, and external characteristic curve were compared. The results show that under the same flow condition, the gas-phase particle diameter has the most severe influence on the external characteristic.
The current status of CAD applications and industrialization in China is concisely described in the paper Then, the potentiality of an extensive market of CAD applications is analyzed. Finally, models of developing CAD applications and industrialization in China are related.
THE CURRENT STATUS OF CAD APPLICATIONS AND INDUSTRIALIZATION IN CHINA
Chinese government supports the development of CAD applications and industrializationComputer aided design is a critical high technology to accomplish design automation, expedite the transformation from scientific and technological achievements to production forces, and to accelerate national economy development and four modernizations. The application of CAD technology is not only the main aspect of reformation of traditional industrial technologies but also an important leverage to raise product and engineering design to a higher level, reduce cost, shorten design cycle, and to improve the labor productivity, as well a significant requirement for enterprises to enhance their competitive power and adaptive faculty in market. The level of applying CAD technology is also one of the major marks indicating the level of national industrial technologies.
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