Abstract
Three kinds of rotor profiles of a radial inflow millimeter-scale turbine with a rotor diameter of 10 mm were designed and analyzed with numerical simulation. Their aerodynamic performances were compared and a suitable basic profile was selected. Then redesign and optimization of the profile selected were performed to enhance the total-static efficiency. The results indicate that the profile whose camber line turns to the negative rotating direction is the best one and can be adapted to the higher rotational speed with higher shaft power and efficiency. The leaving velocity loss of the millimeter-scale turbine increases with the increase of expansion ratio. The lower expansion ratio should be chosen if the high total-static efficiency is mainly considered in the design process. The ratio of inlet area to exit area of the diffuser has significant influence on the overall performances of millimeter-scale turbines, and the maximum total-static efficiency will be achieved when the area ratio is around 1:1.
| Original language | English |
|---|---|
| Pages (from-to) | 15-19 |
| Number of pages | 5 |
| Journal | Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University |
| Volume | 43 |
| Issue number | 1 |
| State | Published - Jan 2009 |
Keywords
- Millimeter-scale turbine
- Numerical simulation
- Rotor profile