- Tytuł:
- Influence of impeller blade rounding and surface roughness on the internal hydraulics and performance of pump as turbine
- Autorzy:
-
Gaji, Rahul
Doshi, Ashish
Bade, Mukund
Singh, Punit - Powiązania:
- https://bibliotekanauki.pl/articles/27309885.pdf
- Data publikacji:
- 2023
- Wydawca:
- Polska Akademia Nauk. Czasopisma i Monografie PAN
- Tematy:
-
pump as turbine
impeller blade rounding
CFD analysis of PAT
simple modifications in PAT
hydraulic analysis
pompa jako turbina
zaokrąglenie łopatek wirnika
Analiza CFD PAT
proste modyfikacje w PAT
analiza hydrauliczna - Opis:
- The Pump As Turbine (PAT) is an important technology for low-cost micro-hydropower and energy recovery, and hence the internal hydraulics of PAT needs to be clearly understood. Additionally, during its operation, the sediments in the water increase the roughness of the internal surfaces and may alter the internal hydraulics and PAT performance similar to a centrifugal pump or Francis turbine. The researchers tried hard to perform simple modifications such as impeller blade rounding to increase the efficiency of PAT. In this paper, the developed test rig is used to analyze the performance of the impeller blade rounding and is validated with a numerical model. This numerical model is further used to study the influence of impeller blade rounding and surface roughness on internal hydraulics and PAT performance. The impeller blade rounding at the most increased the PAT efficiency by 1-1.5 % at the Best efficiency point (Q=16.8 lps), mainly due to the wake reduction on the suction side and increased flow area. With increasing the surface roughness from 0-70 μm, the PAT efficiency is decreased maximum by 4 %. The efficiency was mainly reduced due to increased hydraulic losses at flow zone and disk friction losses at the non-flow zone.
- Źródło:
-
Archive of Mechanical Engineering; 2023, LXX, 2; 219--245
0004-0738 - Pojawia się w:
- Archive of Mechanical Engineering
- Dostawca treści:
- Biblioteka Nauki
Artykuł