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| Next Generation In Situ Measurements of Stratospheric Aerosol | |
| 项目编号 | 1619632 |
| Terry Deshler | |
| 项目主持机构 | University of Colorado at Boulder |
| 开始日期 | 2016-08-01 |
| 结束日期 | 2018-07-31 |
| 英文摘要 | Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:none; font-size:11.0pt; font-family:"Calibri",sans-serif; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;}An Advanced Gas Foil Bearing UsingSupercritical Carbon Dioxide as the Working Fluid—Mechanical Solutions, Inc.,Whippany, NJ, 11 Apollo Drive, Whippany, NJ 07981-1423PeterChapman, Principal Investigator, pac@mechsol.comKarenRizzi, Business Official, ksr@mechsol.comAmount: $1,000,000 As new applications arise for supercritical CO2 (sCO2) power generation, and higher efficiencies are achieved through higher system pressures andtemperatures, the need toimprove technologies becomes essential. Traditionally lubricated and cooled oil bearings cannot tolerate these temperatures,andthe higher pressures makes keeping the oil separate from the sCO2an increasingly difficult challenge. These conditions strongly promote using the sCO2as the lubricant,rather than oil.This grant application seeks to develop a new gas foil bearing that meets these needs byusing the sCO2 as the lubricating fluid by substantially advancing the art toprovide increased load capacity, damping, and wear resistance. To achieve project objectives, best-in- classtechnologies in pressurized hydrostatic gas bearings and hydrodynamic gas foil bearings will becombined toproduce an advancedhydrostatically-assisted hydrodynamic gas bearing design. Analytical models and codes were updated to include the fluidpropertiesof sCO2. Novel bump foil geometries and patterns were evaluated to maximize stiffness and damping characteristics. Candidatecoatings were evaluated for start-stop wear resistance. Prototype bearings were fabricatedandinstalled in a high-speedtest rig for validationtesting (using air) of hydrostatic andhydrodynamic performance.Refinement of the analytical models will continue in order to predictbearingperformance using sCO2as the workingfluid. Design data will be obtained from sCO2machinery OEMs (including a major OEM collaborator) as a basis for generating full-scale bearingdesigns. Foil andhydrostatic pocket geometries will be optimizedfor the largerbearings. Prototypeswillbe designed, fabricated, and validationtestedina representative sCO2environment. Commercial Application and Other Benefits:Theproposed effort directlysupports both commercial andfederalinterests. Foilbearings are anenabling technology which allows the creation ofmachines that otherwise could not be built, particularly in high speed machines or in ultra-pure systems like sCO2where contaminants, such as oil or grease, cannot be tolerated. Advancements in the technologycan be immediately utilized in a variety of applications ranging from sCO2 systems, ground-based gas turbine-powered electricpower generators, compressors, refrigeration equipment, vehicular systems (turbochargers, fuel cell blowers), aerospace environmental control systems, auxiliary power units,small to mediumpropulsion gas turbines,androcket turbopumps. |
| 学科分类 | 08 - 地球科学;0805 - 大气科学 |
| 资助机构 | US-NSF |
| 项目经费 | 365759 |
| 项目类型 | Standard Grant |
| 国家 | US |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/73776 |
| 推荐引用方式 GB/T 7714 | Terry Deshler.Next Generation In Situ Measurements of Stratospheric Aerosol.2016. |
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