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This paper introduces the wind tunnel tests and test results of two kinds of propeller with different blade angle. The 3D test section of NF-3 wind-tunnel of Northwestern Polytechnical University is used to perform the wind-tunnel test. In the test, wind speed are 0m/s, 20m/s, 30m/s and 40m/s, propeller speed are 900, 1200, 1500, 1800, 2100, 2400, 2700, 3000, 3300, 3600, 3900(r/min). The wind tunnel test results show that when the two propellers with the same airfoil and the chord length distribution along radial direction, different blade angle distribution along radial direction, the thrust, torque, power and efficiency have a significant difference. The propeller with more blade angle has more thrust and power, the propeller with more blade angle is suitable for high advanced ratio, the propeller with less blade angle is suitable for low advanced ratio. Introduction Generally, new energy aircraft utilized the propeller to generate the thrust. In the design phrase of new energy aircraft, It’s very necessary to predict the efficiency, thrust, power, torque of propeller. Many scholars had studied the design, analysis and test of propeller. ANGELO et al. [1] presented a calculation method of propeller performance. Their method can calculate the thrust coefficient, torque coefficient, power coefficient and efficiency. ROMEO et al. [2] presented the design, manufacture, test of propeller for a fuel cell aircraft. SLAVIK [3] proposed a calculation method of thrust coefficient and power coefficient of propeller. BRANDT and SELIG [4] carried out the wind-tunnel test of 79 propellers with diameter 9-11 inch, rotation range is 1500-7500r/min. HALL [5] presented a method to analyze the propeller performance with extreme attack angle. OL et al. [6] carried out the wind-tunnel test and performance calculation of the propeller of a small electric UAV. Sabzehparvar [7] proposed a propeller model which can predict static and dynamic thrust, torque. GUR and ROSEN [8] presented a calculation method of propeller performance with low advanced ratio. In this paper, the wind-tunnel test of two kinds of propeller with different blade angle is presented. The thrust, torque, power and efficiency of propeller are obtained and analyzed. Wind-tunnel Test The 3D test section of NF-3 wind-tunnel of Northwestern Polytechnical University is used to perform the wind-tunnel test. Width of test section is 3.5 meter, height is 2.5 meter, and length is 12 meter. The wind-tunnel is shown in Figure 1. The VXI data acquisition system is shown in Figure 2. The test propeller in the wind-tunnel is shown in Figure 3.

Aerodynamic Characteristics Test for Two Kinds of Propeller with Different Blade Angle