Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Powiadomienia systemowe

Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Reconstruction of turbomachines on the basis of the flow structure visual diagnostics

Arsiri V., Kravchenko O.

Mechanics and Mechanical Engineering

2018

Vol. 22, nr 2

405--414

The indicator of the quality of modern turbomachines is only the coefficient of efficiency, which characterizes the ratio of the useful work of compressors or fans to the energy expended on the drive. For the analysis of the quality of the motion, processes in flow parts, the values of resistances are used which are difficult to be considered as an indicator of the efficiency of dynamic processes. The report presents the results of visual diagnostics of the structure of flows during the movement in the elements of turbomachines, as well as options for improving the geometry of the flow parts - in the inlet pipes, impellers. For the analysis of the efficiency of the motion of liquids and gases in flowing parts, a calculated index is proposed - the coefficient of hydraulic efficiency of dynamic processes. The joint use of two indicators - the efficiency of transformation of different types of energy (efficiency of turbomachines) and the efficiency of dynamic processes in flowing parts allows us to develop and to analyze the results of reconstruction of turbomachines. Reconstruction of turbomachines with the purpose of improving the geometry of the flow parts provides an increase in productivity of turbines, compressors, fans and pumps, while reducing the specific energy consumption for the processes of compression and transport of liquids and gases. Optimization of turbomachines flow parts based of flow structure visual diagnostics allows to reduce noise and vibration, as well as to solve other problems.

The physical method of visual diagnostics of flow structure

Arsiri V., Arsiriy E.

Zeszyty Naukowe Politechniki Rzeszowskiej. Budownictwo i Inżynieria Środowiska

2009

z. 54 [266]

5-8

The article presents results of using the flow structure design equipment, which is based on the method of visual diagnostics of flow structure simulations in the physical models. The changes of radial compressor collector were designed according to distributing of speeds which were exposed by the method of visual diagnostics. The tests results on the stand of "H. Cegielski-Poznań" firm has shown the reduction of noise during work of compressor DA-21O from 96 to 84dB, at the same time the efficiency of work was increase up to 2,3%.