International Journal of Frontiers in Engineering Technology, 2026, 8(1); doi: 10.25236/IJFET.2026.080109.
Wenjie Li1, Biao Wang1
1University of Science and Technology Liaoning, Anshan, China
A straw water pump is a simple fluid transport device that utilizes centrifugal force to lift liquid, and its water output performance is influenced by multiple factors, including the geometric parameters of the straw, rotational speed, and immersion depth. Based on fluid mechanics theory, this paper establishes a theoretical analysis model for the straw water pump. The influence of depth on flow velocity is analyzed using the Bernoulli equation, while a force balance condition for stable flow is obtained through a mechanical analysis of a fluid microelement within the rotating straw. By combining this with the power balance relationship, a quantitative relationship between flow velocity and the straw diameter, rotational angular velocity, and immersion depth is derived. Theoretical analysis indicates that the water output per unit time increases with larger straw diameter and higher rotational angular velocity, while it exhibits a nonlinear characteristic of initially increasing and then stabilizing with greater immersion depth. This study provides a theoretical basis for the structural optimization and performance prediction of straw water pumps.
Straw Water Pump, Centrifugal Force, Bernoulli Equation, Power Balance, Water Output
Wenjie Li, Biao Wang. Study on the Factors Influencing the Water Discharge Performance of a Straw Water Pump. International Journal of Frontiers in Engineering Technology (2026), Vol. 8, Issue 1: 59-64. https://doi.org/10.25236/IJFET.2026.080109.
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