PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 4

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  centrifugal compressors
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available remote Advances and breakthroughs in diffusers for compressors and pumps: a short history of diffusers for centrifugal machines
Japikse D.
Mechanics and Mechanical Engineering
|
2018
|
Vol. 22, nr 2
495--508
EN
The diffuser plays an indispensable role in setting the useable flow range and efficiency for centrifugal machinery. Key aspects of the history and design of such diffusers are overviewed followed by a look at current, novel ideas for better systems. Improved machinery can be expected in the coming years due to decades of development work in this field.
2
Content available Analysis of flow structure and performance of the centrifugal compressor impeller
Grzelczak M., Tralewski A., Pałucki Z.
Transactions of the Institute of Fluid-Flow Machinery
|
2016
|
nr 132
87--101
EN
The presently applied desulfurization technologies require a supply of air through centrifugal compressors realizing the pressure increment on the level of 150–200 kPa. Taking the necessary mass flow rate of the processed air into account it is necessary to increase the efficiency of the compression process realized in these machines. The paper will include the results of the works related to the analysis of the gas flow in the compression stage operating with two impellers. The first one has been described with a mathematical function preserving the condition of ruled surface and the geometry of the other impeller has been modeled according to the shape of the meridional velocity profile in the inlet section thus forming leading edge. The common feature of both impellers is the same mathematical function that describes the meridional section and the profile of the blade. The outer diameter of each of the impellers is 200 mm and the blade angle in the outlet section 45◦. The compression stage reaches the pressure ratio of 1.4 at the nominal mass flow of 0.73 kg/s maintaining the impeller rotational speed on the level of 24 400 rpm. For the evaluation of the operating parameters and the nature of the gas flow in the compression stage operating with two impellers computational fluid dynamics simulations were carried out and experimental research has been performed using laser Doppler anemometry for impeller of ruled surface.
3
Content available remote Techniczne i ekonomiczne aspekty odzysku ciepła w tłoczniach gazu ziemnego
Woliński K., Osiadacz A. J.
Gaz, Woda i Technika Sanitarna
|
2016
|
Nr 6
209--212
PL
W artykule porównano z punktu widzenia technicznego i ekonomicznego wybrane systemy odzysku ciepła możliwe do zastosowania w tłoczniach gazu ziemnego wyposażone w sprężarki odśrodkowe napędzane turbinami gazowymi.
EN
In the article selected heat recovery systems were compared from technical and economical point of view, possible for use in gas compressor stations fitted with centrifugal compressors driven by gas turbines.
4
Content available remote Zastosowanie numerycznych technik obliczeniowych w procesie projektowania i modernizacji sprężarek przepływowych
Kryłłowicz W., Magiera R.
Pneumatyka
|
2006
|
nr 2
37-39
EN
A full recognition of phenomena that occur in turbomachines by means of experimental investigations is time-and labor-consuming. In general, such investigations are very expensive as well. Sometimes the measurement of parameters of interest is insufficient or even impossible. Therefore, during recent years when time and economy play the most important role, a rapid development in tools for simulation of a wide spectrum of phenomena occurring, among others, in technology, can be observed. Commercial numerical codes available on the market allow us to predict the phenomena that occur in reality in a more and more precise way. The most important advantage of these solutions is the fact that much shorter time is needed to solve a given problem and less money is involved to obtain the data needed. However, the simulation of a real phenomenon remains still a mathematical simplification, although more and more precise, of reality. In many cases, such an attitude is satisfactory However, there are numerous instances when the numerical simulation without the experimental verification is insufficient. Sometimes experimental investigations conducted even on a machine model are necessary to pose boundary conditions in t numerical code. Such a situation oft takes place in case of turbomachines In this paper, a combination of latest CFD methods with the experimental verification on the example of the investigations of the DPI1.12 blower conducted at the Institute of Turbomachinery, TUL, has been presented. The ANSYS CFX version 10.0 commercial code has been employed for these flow simulations.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.