Download or read book Evaluation of a Hybrid Hydrostatic Bearing for Cryogenic Turbopump Application written by and published by . This book was released on 1986 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulk Flow Analysis of Hybrid Thrust Bearings for Advanced Cryogenic Turbopumps written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: A bulk-flow analysis and computer program for prediction of the static load performance and dynamic force coefficients of angled injection, orifice-compensated hydrostatic/hydrodynamic thrust bearings have been completed. The product of the research is an efficient computational tool for the design of high-speed thrust bearings for cryogenic fluid turbopumps. The study addresses the needs of a growing technology that requires of reliable fluid film bearings to provide the maximum operating life with optimum controllable rotordynamic characteristics at the lowest cost. The motion of a cryogenic fluid on the thin film lands of a thrust bearing is governed by a set of bulk-flow mass and momentum conservation and energy transport equations. Mass flow conservation and a simple model for momentum transport within the hydrostatic bearing recesses are also accounted for. The bulk-flow model includes flow turbulence with fluid inertia advection, Coriolis and centrifugal acceleration effects on the bearing recesses and film lands. The cryogenic fluid properties are obtained from realistic thermophysical equations of state. Turbulent bulk-flow shear parameters are based on Hirs' model with Moody's friction factor equations allowing a simple simulation for machined bearing surface roughness. A perturbation analysis leads to zeroth-order nonlinear equations governing the fluid flow for the thrust bearing operating at a static equilibrium position, and first-order linear equations describing the perturbed fluid flow for small amplitude shaft motions in the axial direction. Numerical solution to the zeroth-order flow field equations renders the bearing flow rate, thrust load, drag torque and power dissipation. Solution to the first-order equations determines the axial stiffness, damping and inertia force coefficients. The computational method uses well established algorithms and generic subprograms available from prior developments. The Fortran9O computer program hydrothrust runs ...

Download or read book Investigation of Hydrostatic Bearings for Use in High Pressure Cryogenic Turbopumps written by W. E. Young and published by . This book was released on 1967 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this program were to (1) establish operating parameters and design criteria for hydrostatic bearings used in high-pressure liquid oxygen and liquid hydrogen turbopumps, (2) determine the extent of performance increases that may be realized by the use of hydrostatic bearings, and (3) demonstrate the application of hydrostatic bearings to high-pressure turbopumps by modifying an existing turbopump design for their incorporation. An analytical design study was made of a liquid oxygen/liquid hydrogen high-pressure 250,000-lb thrust rocket engine cycle with turbopumps using hydrostatic bearings. Conceptual designs were made of the two turbopumps, and the hydrostatic bearing operating parameters were thereby established. The engine cycle and the turbopumps from this study were then compared with an engine cycle using turbopumps designed with rolling element bearings and the advantages or improvements in performance were determined. A hydrostatic bearing computer design program was developed under subcontract by Mechanical Technology, Inc. and was used to design bearings for testing in LH2 and LO2. A test rig was designed and fabricated specially for the bearing testing. Tests were conducted in LH2 and LO2 on the bearings and on transient shaft support systems under simulated turbopump conditions including the start and shutdown transients confirming the feasibility of using hydrostatic bearings in LH2 and LO2. The design of an existing high pressure LH2 turbopump was modified to incorporate hydrostatic bearings.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Paper written by and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technique for Temperature Compensation of Eddy current Proximity Probes written by Robert M. Masters and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Paper written by United States. National Aeronautics and Space Administration and published by . This book was released on 1989 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1987 with total page 1260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Orbit Transfer Vehicle Engine Technology Program Task B 6 High Speed Turbopump Bearings written by ROCKWELL INTERNATIONAL CANOGA PARK CA ROCKETDYNE DIV. and published by . This book was released on 1992 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bearing types were evaluated for use on the OTV high pressure fuel pump. The high speed, high load, and long bearing life requirements dictated selection of hydrostatic bearings as the logical candidate for this engine. Design and fabrication of a bearing tester to evaluate these cryogenic hydrostatic bearings was then conducted. Detailed analysis, evaluation of bearing materials, and design of the hydrostatic bearings were completed resulting in fabrication of Carbon P5N and Kentanium hydrostatic bearings. Rotordynamic analyses determined the exact bearing geometry chosen. Instrumentation was evaluated and data acquisition methods were determined for monitoring shaft motion up to speeds in excess of 200,000 RPM in a cryogenic atmosphere. Fabrication of all hardware was completed, but assembly and testing was conducted outside of this contract. Rocket Engine, Hydrostatic, Bearings, Cryogenic, Turbopump, Rotordynamic.

Download or read book Journal of Tribology written by and published by . This book was released on 2003 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Lewis Research Center Technical Publications Announced in 1986 written by and published by . This book was released on 1987 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index written by and published by . This book was released on 1987 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

Download or read book Small High speed Bearing Technology for Cryogenic Turbo pumps written by and published by . This book was released on 1974 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1987 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of Damping 89 written by and published by . This book was released on 1989 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1991 with total page 1434 pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index