tailieunhanh - The effect of D/H aspect ratio change on energy characteristics of H-type darrieus turbine

This paper simulates the circumstances on changing D/H aspect ratio of the runner samples, specifically in 03 cases including D/H = , D/H = 1 and D/H = to evaluate the working capacity and efficiency of the turbine, and then to establish the curves on power characteristics of H-type Darrieus turbine. Based on that, we can select the runner sample working better than the remaining samples. | Journal of Science & Technology 122 (2017) 048-051 The Effect of D/H Aspect Ratio Change on Energy Characteristics of H-type Darrieus Turbine 2 Nguyen Quoc Tuan1*, Nguyen The Mich2, Do Huy Cuong2 Institute for Hydro power and Renewable energy – Vietnam Academy for Water Resources Hanoi University of Science and Technology – No. 1, Dai Co Viet Str., Hai Ba Trung, Ha Noi, Viet Nam Received: February 16, 2017; Accepted: November 03, 2017 1* Abstract For the H-type Darrieus turbine runner, the geometry parameters such as runner diameter, blade height, number of blades, D/H ratio, blade profiles. have certain effects on working capacity and the efficiency of the turbine. Therefore in order to provide runner samples with high efficiency and working capability, it is needed to design, simulate and test many runner samples, and then select the most suitable one with real water flow condition. This paper simulates the circumstances on changing D/H aspect ratio of the runner samples, specifically in 03 cases including D/H = , D/H = 1 and D/H = to evaluate the working capacity and efficiency of the turbine, and then to establish the curves on power characteristics of H-type Darrieus turbine. Based on that, we can select the runner sample working better than the remaining samples. Keywords: Simulation, H-type Darrieus turbine, hydro power, renewable energy, Ansys-Fluent software 1. Introduction 1 the maximum value and then decrease gradually[1] Blade profiles affect much on the working efficiency of turbine. There are many kinds of high quality aerodynamic profiles studied at famous research institutions on aero-dynamic in the world. Currently, the most popular one is NACA profile of National Aeronautics and Space Administration (NASA, in the ) used for H-type Darrieus turbine. NACA profile has many suitable characteristics of aero-dynamics such as Reynolds number, angle of attack, chord length, coefficients of lift and thrust, sliding scale, largest and .