Abstract

The purpose of research-development of methods of numerical optimization rotatable support pads gasostatic hybrid bearing. In the world‘s aerospace engineering the gas-dynamic bearings are currently most common. They are characterized by the supporting layer of different designs, which ensures the workability of the rotors during starts and stops. The main problem of this bearing type, apart from the construction complexity is the wear of this supporting layer. Gas-static bearing has no such defect, since there is no physical contact between solid surfaces. This study presents the results of the hybrid bearing’s calculation, combining both technologies. The slotted nozzle of non-conventional shape that mirrors the solution of Reynolds equation’s isoline is studied. The dependences of the main parameters on the speed of the shaft’s rotation are discussed. The aerodynamic resistance of pads for different regimes of operation is investigated.

Keywords:

Computational methods, gas-dynamic bearing, gas dynamics, gas-static bearing, hybrid bearing, hybrid bearing pad,

References

1. Beschastnykh, V.N. and Y.A. Ravikovich, 2010. Heavy gas bearing for turbine engine rotors. Experience in development and implementation perspectives. Vestn. MAI, 17(3): 84-94.
   
2. Beschastnykh, V.N., Y.A. Ravikovich and A.N. Sokolov, 2009. Definition of segmented gasostatic bearing static load. Vestn. MAI, 16(1): 84-94.
   
3. Bulat, P.V. and V.N. Uskov, 2012a. About the survey of oscillatory motion of the gas suspended rotor for turbo-refrigerating machines and expanders. Part I. Statement of the problem. Vestn. Int. Acad. Refrig., 3: 3-7.
   
4. Bulat, P.V. and V.N. Uskov, 2012b. About the survey of oscillatory motion of the gas suspended rotor for turbo-refrigerating machines and expanders. Part II. Pressure oscillations in the supply nozzles system on supercritical operation. Vestn. Int. Acad. Refrig., 1: 57-60.
   
5. Bulat, P.V., O.N. Zasuhin and N.V. Prodan, 2012. Features of the application of turbulence models in the calculation of flows in supersonic paths of perspective propulsion jet engines. Dvigatel, 1: 20-23.
   
6. Bulat, P.V., O.S. Smirnova and N.V. Prodan, 2013. Application of the guided gaso-and hydrostatical bearings in the turbopump aggregates. Fund. Res., 4(2): 335-339.
   
7. DellaCorte, C., V. Lukaszewicz, M.J. Valco, K.C. Radil, H. Heshmat et al., 2000. Performance and durability of high temperature foil air bearings for oil free turbomachinery. NASA/TM-2000-209187/REV 1 ARL-TR-2202 NASA, Glenn Research Center.
   
8. Grassam, N.S. and J.W. Powell, 1964. Gas Lubricated Bearing. Micro Turbine Developments Ltd., Butterworths, London, pp: 398.
   
9. Listopadov, I.V. and B.B. Shershnev, 2006. Modeling of segmented gas bearing. ANSYS Solutions. Russian Red., Winter 2006: 43-45.
   

Competing interests

The authors have no competing interests.

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