Experimental Study On Pneumatic Characteristic Of The Large Capacity Concentrated Wind Energy Turbine Model

The research was part of the project–wind tunnel test and study on serial impellers of CWET founded by National Natural Science Foundation of China (the number warranted:59306060) .The aim was to find pneumatic and power performance of resemble model of Large Capacity CWET carried by in-truck test. The result was compared with the data obtained in the wind tunnel and established the design formula in principl of serial capacity of CWET.The resemble modelⅠwas designed and made based on the CWET.Total pressure, static pressure and some other pneumatic characteristics in contracting pipe, center cylinder and diffuser of the resemble modelⅠwere tested. The result of test was analyzed, and showed that the flow speed (where impeller installed in modelⅠ) was 1.31 times faster than the speed of natural wind, and the flux energy increased to 2.25 times.Through the pneumatic experiment of resemble modelⅠ, it was discovered the fact that the flow speed was 1.34 times faster than the natural wind speed at 565mm to the entrance section (37.8% of the length of diffuser in axial spacing),and flux energy increased to 2.41 times of the same area.On the base of resemble modelⅠ, the figure of contracting pipe was changed, the generatrix became arc for once it was straight line, named resemble modelⅡ. Total pressure, static pressure and some other pneumatic characteristics in contracting pipe, center cylinder and diffuser of the resemble modelⅡwere tested. It was tested outside in-truck under the same experimental condition as it was in the test of resemble modelⅠ. The result obtained showed that it was 1.38 times faster than the speed of natural wind where impeller installed, compared with modelⅠthe value increased 5.3%. Flux energy became 2.63 times of the natural wind in same area, 16.9% higher than modelⅠ.In the pneumatic experiment of resemble modelⅡ, it was found that the flow speed at 365mm to the entrance section 0f resemble modelⅡ(entrance section of diffuser) was 1.40 times faster than the natural wind speed, 4.5% higher than resemble modelⅠ. Flux energy increased to 2.74, 13.7% higher than modelⅠ. The fact was worth to lucubrate.In pneumatic experiment of resemble modelⅡ, pneumatic characteristic was studied at the speed of 12m/s under various temperature. The result of test proves that the effect of temperature on pneumatic characteristic in accordance with the result of theories analyze. The experiment result provided guidance for the establishment of theories...