Wyniki wyszukiwania - BazTech

Ograniczanie wyników

4 Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

Znaleziono wyników: 4

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: turbomechanika

Sortuj według:

Ogranicz wyniki do:

Oil free bearing development for high-speed turbomachinery in distributed energy systems – dynamic and environmental evaluation

Tkacz E., Kozanecka D., Kozanecki Z., Łagodziński J.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2014

nr 145

121--122

Modern distributed energy systems, which are used to provide an alternative to or an enhancement of traditional electric power systems, require small size high-speed rotor turbomachinery to be developed. The existing conventional oil-lubricated bearings reveal performance limits at high revolutions as far as stability and power loss of the bearing is concerned. Non-conventional, oil-free bearings lubricated with the machine working medium could be a remedy to this issue. This approach includes a correct design of the machine flow structure and an accurate selection of the bearing type. Chosen aspects of the theoretical and experimental investigations of oil-free bearings and supports, including magnetic, tilting pad, pressurized aerostatic and hydrostatic bearings as well as some applications of oil-free bearing technology for high-speed turbomachinery are described in the paper.

Monitoring and diagnostics of special-purpose turbomachines

Gizelska M.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2014

nr 145

47--48

In the operation of special-purpose turbomachines, diagnostic tools which enable control of the machine technical state and its operation parameters in the on-line mode are necessary. The acquisition and processing of the measurement data in real time, which are indicators of the machine functioning under various operating conditions, are crucial. The paper presents two types of computer designed diagnostic tools to monitor in real time the dynamic and thermodynamic parameters of special-purpose turbomachines. The first one monitors the dynamics of the rotating system with an active magnetic bearing, the second - monitors the instant value of polytropic efficiency of the compression process, which was designed for the industrial machine.

CFD for turbomachinery applications – fifteen years experience with code FlowER

Yershov S. V.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2008

nr 133

369--382

The paper presents shortly current state of numerical simulation of turbomachinery flows. The choice of flow model, turbulence modelling and numerical technique is considered by the example of CFD solver FlowER. The numerical results for turbomachinery flows concerning unsteady effects, flow leakages, film-cooling and blade shape optimization are shown.

Computer-aided improvement of the axial turbomachinery rows streamlined by 3D viscous flow

Ugrywnov M. L., Tsegelnik A. M., Menyaylov A. V.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

1999

nr 115

379--386

In the offered article is considered the statement and method of solving of a compressor blade row profiles construction problem at unseparete steadied streamlining by a flow of ideal polytropic gas at transonic flow velocity on an entrance. The solution of an inverse problem of aerodynamics is finding as sequence of the solution of a series of straight lines of problems.