EXPERIMENTAL ANALYSIS OF AIROIL SEPARATOR PERFORMANCE

1、EXPERIMENTAL ANALYSIS OF AIROIL SEPARATOR PERFORMANCE空气/油分离器性能的实验分析1ASME Turbo Expo美国机械工程师协会涡轮博览会Presented by the ASMEAnnual conference美国机械工程师学会（美国机械工程师学会（American Society of Mechanical Engineers，ASME）成立于成立于18801880年，目标是促进技术、科学、机械实践与多学科工年，目标是促进技术、科学、机械实践与多学科工程及其相关科学的发展。程及其相关科学的发展。涡轮机械涡轮机械EI2专栏ASME T

2、urbo Expo3作者 K. Willenborg, M. Klingsporn(Germany)Rolls-RoyceDeutschlandLtd&COKGAir&OilSystems S. Tebby, T. Ratcliffe(UK)DunlopEquipmentLtd P. Gorse, K. Dullenkopf, S. Wittig(Germany)UniversittKarlsruhe卡尔斯鲁厄大学4作者 S. Tebby, T. Ratcliffe(UK)DunlopEquipmentLtd邓禄普设备有限公司Dunlop-Aerospace航空航天设备及其实验研究平台5文章结

3、构图SeparationEfficiency分离效率Summaryofresults结果总结PressureDrop压降6Motivation7ObjectivesMost of the liquid oil is separated out before it can reach the rotating metal foam. Only droplets with a diameter below 3 - 4 m follow the air flow radially inwards and are drawn against the centrifugal forces in the

4、swirling flow into the rotating metal foam.Therefore, the main emphasis of the current investigation was on the separation of small droplets that may contribute to visible emissions. 8separation efficiency the pressure loss： air flow rate； oil flow rate； separator speed； temperature. Objectives9Two

5、industrial and the one academic partner. The test rig was built and operated by Dunlop quipment. University of Karlsruhe provided the special measuring equipment, recorded the test data and performed data. Rolls-Royce Deutschland defined boundary conditions and co-ordinated the tests. EXPERIMENTAL S

6、ETUP10Dunlop Breather Test Rig11Droplet Generator12 Temperatures:Platinum resistance thermometers. Differential pressures :piezoresistive pressure sensors(with an uncertainty of less than 0.1% full scale) Air flow :A propeller type flow meter Oil flow:A positive displacement type flow meter. (with a

7、n uncertainty of less than 5 %) Rig Instrumentation and Data Acquisition13The following parameters were acquired by the rig data acquisition system: air temperature and pressure upstream of droplet generator oil mass flow supplied to the droplet generator oil temperature and pressure upstream of dro

8、plet generator air flow rate and air temperature downstream of breather pressure at breather inlet pressure at breather outlet differential pressure between breather outlet and breather inlet Rig Instrumentation and Data Acquisition For a data point the readings were averaged over a period of 30 sec

9、onds14 Effect of Air Flow RateSeparation Efficiency15Separation Efficiency Effect of Rotational Speed 16Separation Efficiency Effect of Droplet Size 17 Effect of Air Flow RatePressure Drop18Pressure Drop Effect of Rotational Speed 19Summary of resultsThe following main results have been obtained:1、

10、The separation efficiency of the breather increased with decreasing air flow rate, i.e. increasing residence time of oil particles in the breather.2、The separation efficiency increased with increasing rotational speed.3、The separation efficiency increased with increasing particle size.20Summary of r

11、esultsThe following main results have been obtained:4、Only droplets below a certain size ( 0.5 m) can pass the breather.5、The separator itself did not produce mist in the tests.6、The breather pressure drop increased with increasing air flow rate and with increasing rotational speed.7、The effect of the rotational speed on the breather pressure drop is stronger than the effect o