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The results of strength and gas dynamic improvement of turbocharger TK-32 axial turbine are presented. Turbocharger is manufactured by LLC "Penzadieselmash" (Penza, Russian) and used as unit boost for diesel locomotive. The aim of this work was to ensure turbine work capacity when rotor speed is increased by 10% without efficiency reduction. The strain-stress state analysis indicated the...
The rotor dimensioning of a wind turbine is essentially based on aerodynamic theory to define the parameters affecting its overall performance. The blade element momentum theory (BEM) has been widely used as a tool for the design of wind turbine blade. An existing airfoil shape with known chord and twist can be input to BEM to calculate the efficiency. On the other hand, if we set airfoil as unknown...
The mechanical part of the wind turbine is the part that makes direct contact with the wind and it is here that the kinetic energy of wind is converted to mechanical energy. So this part of turbines must respect some conditions, as such must: • Ensure maximum conversion of kinetic wind power to mechanical power; • Resist the maximum possible for different storms (rain, snow …); • Have a long life...
The application of sweep on rotor blades is one of the most significant technological evolution to improve the aerodynamic behavior of transonic compressor stages. New transonic swept rotors are modeled from the original Rotor 37, by changing the meridional curvature of the original stacking line through four control points (located at 20%, 40%, 60% and 80% of span). All the new swept transonic rotors...
At present, there are still some imported steam turbines which are originally designed to operate in throttling governing, which leads to the low efficiency when the steam turbine is working with part load. In order to enhance economical performance of steam turbine, it has to be transformed into nozzle governing. After changing throttling governing to nozzle governing for the steam turbine, the temperature...
This paper presents a technique of detecting turbine disk cracks under spin testing by analyzing the blade tip timing data. The technique is based on the principle that the crack opening displacement of a radial edge crack in rotating disks is a function of the crack length and the square of the rotational speed. The crack opening displacement is related to the inter-blade spacing which is extracted...
Take a domestically-made imported 600 MW subcritical steam turbine unit as an example to carry on the research on steam governing performance of the regulation valve, get the bending stress ratio of the 1st stage blades and turbine's imbalance steam force by calculating, and then confirm the operating safety of the unit under different steam governing arrangements. Through the analysis of the calculation...
A composite 3 meter ocean current turbine blade has been designed and analyzed using blade element theory (BET) and commercial finite element modeling (FEM) code, ANSYS. It has been observed that using the numerical BET tool created, power production up to 141 kW is possible from a 3 bladed rotor in an ocean current of 2.5 m/s with the proposed blade design. The blade is of sandwich construction with...
Todaypsilas wind power plants use motor driven pitch control for rotor blades as a standard design feature for obtaining optimum efficiency. In harsh environment, such a control element may be critical in case of fault. In order to avoid total damage of the blades an inherently working pitch control design is proposed. It uses the special composite material properties and an advanced design. In addition,...
Renewable energy generation strongly relies on wind power aside from water power plants. Technical and economical growth rules ("The larger, the better") yield systems of increasing power now far in the Megawatt range. Wind power rotor blades have to withstand high mechanical stress by standard and disturbed operation through centrifugal and power transmission forces. Especially, heavy wind...
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