Fig. 12. Pressurization process as gas volume fraction varies.Figure optionsDownload full-size imageDownload as PowerPoint slide
4.4. Effects of rotation speed
Fig. 13. Pressurization process as rotation speed varies.Figure optionsDownload full-size imageDownload as PowerPoint slide
A special scroll wrap profile, which is a combination profile consisting of variable- and fixed-radius circular involutes, is presented; and this proposed combination of wrap profiles forms CMX001 chambers with flank clearances to the discharge port, thus permitting this novel multiphase scroll pump to transport gas–liquid mixtures without pressure surges. With decrease of compression chamber volume, the pressure of the gas–liquid mixture in the compression chamber increases, and at the same time very little mixture is lost to the discharge port.
A model for numerical simulation of the proposed multiphase scroll pump is put forward, including geometry of scroll wrap profiles, their boundary motion, fluid motion, grid generation and numerical simulation method. The simulation results, obtained using the commercial flow code Fluent with its k-εk-ε turbulence model, consist of pressure and velocity fields. These results lay the theoretical foundation for design of this novel multiphase scroll pump. At the same time, sensory cortex is clear that future work must focus both on obtaining experimental results for such pumps and on performing more sophisticated (and, hopefully, more accurate) numerical computations using (probably) LES with advanced subgrid-scale models.