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Miniature Hydraulic Turbine enhanced heat transfer performance of the experimental study . Mainly studied in the same experimental conditions, the range of Reynolds number in the case of between 2.0 × 10 ~ 4 ~ 1.0 × 10 ~ 5 , the Reynolds number Re, the liquid turbine pitch h , liquid turbine wheel hub diameter d of the other parameters of liquid turbine flow resistance characteristics and heat transfer . Rotation characteristic experimental results show that the speed n and the flow velocity u was the approximate linear relationship between n With the increase of u increases , its speed and the axial direction of the fluid flow velocity , the velocity and the rotational speed is obtained through multivariate linear fitting Usually relationship . Also showed that : the fluid turbine has a good rotation characteristic , elastic fluid turbine operating under a lower flow rate will be able to operate , and can meet the requirements of heat transfer equipment, flow volume change and fluctuations . Meanwhile , heat transfer experiments show , The liquid turbine has a good heat transfer enhancement effect , six different types of liquid turbine as the Reynolds number increases , the liquid turbine ATC heat transfer enhancement ratio is always greater than 1 . And analysis can be seen: the structural parameters d = 6 The liquid turbine heat transfer enhancement ratio significantly larger than the structural parameters d = 5 of the hydraulic turbine, in the case of the same structural parameters d , with the increase of the structural parameters h lower than their corresponding heat transfer enhancement . Therefore , under the same Reynolds number Re the Y24 type of liquid turbine intensive than the maximum , Y155 - liquid turbine intensive than the smallest . Also can be seen, the pitch small liquid turbines , the drag coefficient ratio is also larger . Conducted a comprehensive evaluation of six different types of liquid turbine , known the overall : Y25 and Y15 Hydraulic Turbine strengthen heat transfer conditions better than other types of liquid turbine . In this paper, Microsoft Access2000 to establish a back-end database , developed using Visual Basic 6.0 and MATLAB6.5 mixed programming Miniature Hydraulic Turbine experimental data processing systems , liquid turbine experiment database information interactive query , graphic display , data processing , and data information update maintenance and other functions , the application is easy to operate , stable operation , and have established a good foundation for the the liquid turbine experimental data and a computer .
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