ملخص البحث :

The influence of two different shapes impeller blades on performance of centrifugal water pump is experimentally investigated under different operational conditions. Test rig is designed and used to operate the required pump during different conditions. The centrifugal water pump is tested under different flow rate with two types of impellers each one consists different blades angle. The experimental results showed that the impeller blade different geometry could improve the water pump mechanical efficiency, the head, the power, and the volumetric efficiency by 11.7, 15.38, 24.2, and 12.9% respectively. The experimental results showed better centrifugal water pump performance when impeller blade with higher outlet angle is used.

ملخص البحث :

This study aims to investigate the impact of tillage speed, tire pressure, traction force, and bulk density on the functionality of a local Moldboard Plough in Al-Musaib, Iraq. A 4WD MF 470 Xtras tractor was used to evaluate the plough's performance under varying tillage speeds and tire pressure levels. The two-way ANOVA with three replication was conducted to examine the effects of these factors on traction force, bulk density, slippage percentage and field efficiency, all crucial mechanical factors that influence Moldboard Plough functionality. The results revealed significant effects of tillage speed and tire pressure on various mechanical factors influencing Moldboard Plough functionality. At a tillage speed of 8 km/h, the traction force increased by an average of 15% compared to 4 km/h. Similarly, adjusting the tire pressure from 20 Par to 30 Par resulted in a decrease in bulk density from 1.6 g/cm3 to 1.3 g/cm3.The study also found that specific combinations of tillage speed and tire pressure led to improved performance. The combination of 6 km/h tillage speed and 30 Par tire pressure resulted in a slippage ratio of only 8%, indicating better field efficiency compared to other combinations. These quantitative findings emphasize the importance of optimizing tillage speed, tire pressure, and other mechanical factors to enhance the functionality of Moldboard Ploughs in Al-Musaib. Agricultural practitioners can utilize these results to make informed decisions and implement more efficient and sustainable farming practices. Furthermore, these findings highlight the need for considering specific combinations of tillage speed and tire pressure in the design and development of future Moldboard Ploughs tailored to the region's conditions. © 2024 American Institute of Physics Inc.. All rights reserved.