|
|
|
| Temperature field analysis of centrifugal rotary blood pump based on sinusoidal speed modulation |
| WANG Chuchen1, HUANG Feng1,2* |
| 1. College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang 310018, China; 2. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, Zhejiang 310027, China |
|
|
|
| Guide |
|
|
Abstract In order to study whether the temperature change of the internal flow field the blood pump under sinusoidal speed modulation will cause blood damage, computational fluid dynamics method was used to simulate the whole dynamic flow process of the blood pump. The inlet and outlet dynamic pressure fitting formula were adopted as boundary conditions. The SST turbulence model with higher accuracy in heat transfer field for numerical simulation. The temperature distribution cloud diagrams of the impeller at different time under constant and sinusoidal speeds were obtained. The distribution of the potential risk area with temperature reaching 39-43 ℃ and the risk area with temperature greater than 43 ℃ in the blood pump were obtained, the volume of each area calculated. At the same time, the dynamic temperature rise inside the blood pump compared and analyzed combined with the blood pump′s structure. The results show that the temperature rise inside the blood pump under the sinusoidal speed modulation is higher than that under the constant speed mode, risk region. The temperature rise is closely related to the impeller′s structure of the blood pump, and the high temperature is concentrated at the front edge and inner sides of the impeller near the lower pump housing. The blood temperature rise at the inlet and outlet under both conditions within the safe range of 2 ℃, would not cause damage to the blood outside the blood pump.
|
|
Received: 10 August 2020
|
| Fund: |
|
|
|
|
|
|
