%0 Journal Article %T Experimental Modeling of a Long Orifice-type Restrictor of High Speed Turbine Hybrid Bearing %J International Journal of Engineering %I Materials and Energy Research Center %Z 1025-2495 %A Tian, Jun %A Wang, Youming %A Ji, Feng %A Zhang, Yuyang %D 2016 %\ 03/01/2016 %V 29 %N 3 %P 378-385 %! Experimental Modeling of a Long Orifice-type Restrictor of High Speed Turbine Hybrid Bearing %K Hybrid bearing %K Long orifice %K type restrictor %K Experimental Model %K Liquid Nitrogen %R %X To overcome the space limit of orifice-type and capillary restrictors in hybrid bearings, a kind of atypical long orifice-type restrictor is proposed and its experimental model is established. Through the analysis of the structure and flow rate of orifice-type restrictor and capillary restrictor, a long orifice-type restrictor and a feasible experimental modeling method are presented by use of orifice plate instead of the whole bearing. The flow rate of water film restrictors are tested under the aspect ratio of 4-10 and the pressure difference of 1.5-5.5MPa and the experimental model of long orifice-type restrictor is established. The result shows that the restrictor of atypical structures needs to be modeled by experiment. The flow discipline of atypical restrictor is approximate to typical orifice-type restrictor and the throttling model is a nearly turbulent model. %U https://www.ije.ir/article_72688_cf7d770dd9bcad9bca3594b9d432bd8a.pdf