The invention discloses a pneumatic-thermal collaborative optimization method for a scallop hole air film cooling structure of a turbine blade. According to the method, a pneumatic-thermal feature agent model of the scallop hole air film cooling structure of the turbine blade is established based on a radial basis neural network, and a particle swarm optimization algorithm is introduced to realize pneumatic-thermal collaborative optimization of the scallop hole air film cooling structure of the turbine blade. The method overcomes the defect that a traditional air film cooling structure optimization method needs to depend on a large quantity of samples. The method has a nonlinear prediction ability, high prediction precision, a strong memorizing ability, high robustness and a good global approximation ability. Moreover, weights of pneumatic performance and thermal performance can be adjusted according to actual demands to design an optimal scallop hole air film cooling structure with both the pneumatic performance and the thermal performance.

Pneumatic-thermal collaborative optimization method for scallop hole air film cooling structure of turbine blade

The invention discloses a method and a system for determining the wind speed distribution of the whole wake field of a wind turbine. The method comprises the following steps of: determining the wind speed distribution near the wake of a wind turbine according to a vortex wake model; determining the wind speed distribution in the far wake of wind turbine according to the engineering wake model, determining the wind speed at 2D position and 3D position according to the near wake wind speed distribution and the far wake wind speed distribution, correcting the wake radius according to the wind speed at 2D position and 3D position and the correction formula, then correcting the near wake wind speed distribution and the far wake wind speed distribution according to the corrected wake radius, andobtaining the corrected near wake wind speed distribution and the far wake wind speed distribution, according to the corrected near wake wind speed distribution and the corrected far wake wind speeddistribution, determining the wind speed distribution of the whole wake field of the wind turbine. The method and the system for determining the wind speed distribution of the whole wake field of thewind turbine provided by the invention can be used for fitting the wind speed distribution of the whole wake field, which not only meets the engineering requirements in precision, but also greatly reduces the calculation amount.

A method and a system for determining the wind speed distribution of a whole wake field of a wind turbine

The invention discloses a fan blade modeling software calling system and a calling method thereof. The system is characterized by comprising a wing section base module, a fan blade parameter input module, an integrated module, a blade three-dimensional modeling module, a fan model module, a blade performance analysis module, a neural network module and an optimum data output module. According to the fan blade modeling software calling system and the calling method thereof, a series of fan modeling software are combined into one system through the manner of calling a dynamic link library or data files to integrate, so as to complete the design of an optimum blade, and complete the detection and optimizing on a simulate fan; all complex modeling and simulation analysis processes are simplified by the system, and blade three-dimensional modeling and simulation, data analysis and an actual test can be completed to obtain an optimum blade model by only inputting simple demand parameters.

Fan blade modeling software calling system and calling method thereof

The invention relates to a wind driven generator with an automatic protection function The wind driven generator with the automatic protection function comprises a base, a vertically arranged tower, a power generating mechanism and a plurality of blades The tower is arranged above the base The power generating mechanism is arranged at the top end of the tower According to the wind driven generator with the automatic protection function, a protection block approaches a hub through a driving motor, and a protection rod is made to do work by overcoming a first spring and a second spring, so that the rotation speed of the blades is decreased, and the protection function is achieved Besides, in a constant voltage output circuit, output voltage is collected through the feedback end of an integrated circuit, and accordingly the stability of the output voltage is adjusted by controlling on-off of a second field-effect transistor and a third field-effect transistor Meanwhile, the output voltage is sampled through the overvoltage protection end of the integrated circuit, the phenomenon that a power circuit is burnt due to unstable voltage distribution of the second field-effect transistor and the third field-effect transistor, and the reliability of the constant voltage output circuit is improved

Wind driven generator with automatic protection function

The present invention discloses an improved airfoil optimization design method, and relates to the field of aerospace. In the improved airfoil optimization design method, a function value and a first order derivative of a newly-added trailing edge disturbing function, i.e. [alpha][chi](1-[chi])[g] at a position of [chi]=1 are both non-zero, so that advantages of a primitive function is retained and meanwhile changes of a trailing edge are controlled; and the alpha in the function is a coefficient for controlling change of a slope rate. Since Hicks-Henne parameter is typically in the order of 10 , in order to ensure that the trailing edge can change significantly without resulting in airfoil distortion, the [alpha] may be between 5 and 15. An improved parametric method is economical and reliable, and has certain practical value in engineering.

Improved airfoil optimization design method

The invention relates to an aerodynamic optimum design method of an airfoil profile of a vertical axis wind turbine The method is characterized by including: determining aerodynamic optimum design content of the airfoil profile and integrating and controlling an experiment design module, an approximate model module and an optimum design module through an Isight platform so as to realize automatic operation of the whole optimum design process, wherein the experiment design module provides sample data and a response value set to the approximate model module, and the calculated amount of the optimum design model is lowered by synergistic effect of the experiment design module and the approximate model module By the method, the problems of large calculated amount of the traditional optimization algorithm and difficulty in seeking the global optimal solution are solved, utilization rate of wind energy of the whole wind rotor is maximized to the optimization objective, and the problem that the instantaneous attack angle of blades continuous changing with large change amplitude is difficult to optimize is solved

Aerodynamic optimum design method of airfoil profile of vertical axis wind turbine

The utility model relates to a self-protection wind power water lifting device with a speed increasing blade. A water lifting mechanism is directly driven by a wind power transmission mechanism. The self-protection wind power water lifting device is characterized in that the cross section of the blade is an airfoil of NACA series and the blade is a streamline speed increasing blade with low wind speed starting and high output torque. The blade is a root of blade with low tip speed ratio and a large twist angle. The blade is divided into 20 cross sections from the root of blade to the tip of blade, and setting angles are arranged on the cross sections. Smooth transition is utilized among the cross sections. A water outlet of a pump of the water lifting mechanism is connected with a water outlet pressure adjusting cylinder of a hydraulic speed regulation mechanism. The problem that the number of blades of a traditional wind power water pumping system is high and the wind power utilization ratio is low are solved, water pressure of the water outlet of the pump under strong wind is utilized skillfully to drive the hydraulic speed regulation mechanism to move, and the wind power transmission mechanism is controlled to timely respond to yaw so that the aim of protecting the unit automatically is achieved. The self-protection wind power water lifting device is suitable for farmland irrigation of remote areas where electrical resources are insufficient.

Self-protection wind power water lifting device with speed increasing blade

The invention relates to a self-protection wind-driven water lifting system with accelerating vanes. The self-protection wind-driven water lifting system comprises a water lifting mechanism directly driven by a wind power transmission mechanism and is characterized in that the cross sections of the vanes adopt NACA series wing sections, the streamline accelerating vanes are started at a low wind speed and output high torques, the vanes comprise low-speed vane tips and large-torsion vane roots and are divided into twenty cross sections from the vane roots to the vane tips for setting mounting angles, and the cross sections are in smooth transition with each other; a water outlet of a water pump of the water lifting mechanism is connected with a water-out pressure regulating cylinder of a hydraulic speed regulating mechanism. The problems of the traditional wind-driven water lifting system, such as large vane number and low wind energy utilizing rate are solved. The hydraulic speed regulating mechanism is driven to act through the skillful utilization of the water pressure of the water outlet of the water pump under large wind power, the wind power transmission mechanism is controlled to timely respond to yaw, and the purpose of automatically protecting system units is achieved. The self-protection wind-driven water lifting system is suitable for the farmland irrigating application of remote areas lack of electricity resources.

Zhao Zhenzhou

Papers

Aerodynamic optimum design method of airfoil profile of vertical axis wind turbine

Self-protection wind power water lifting device with speed increasing blade

Self-protection wind-driven water lifting system with accelerating vanes