A General-Purpose Test Facility for Evaluating Gas Lubricated Thrust Bearings

2021 ◽  
Author(s):  
Keith Gary ◽  
Bugra Ertas ◽  
Adolfo Delgado
Keyword(s):  
General Purpose ◽  
Test Facility ◽  
Thrust Bearings

A General-Purpose Test Facility for Evaluating Gas Lubricated Thrust Bearings

2020 ◽  
Author(s):  
Keith Gary ◽  
Bugra Ertas ◽  
Adolfo Delgado
Keyword(s):  
Gas Turbines ◽  
High Performance ◽  
Load Capacity ◽  
General Purpose ◽  
Test Facility ◽  
Working Fluid ◽  
Test Rig ◽  
Auxiliary Equipment ◽  
Thrust Bearings ◽  
Low Viscosity

Abstract The design, construction, operational capabilities, and proof of concept results are presented for a test rig used to evaluate gas-lubricated thrust bearings. The following work is motivated by a desire to utilize the working fluid of high-performance turbomachinery, such as gas turbines, for bearing lubricant. Auxiliary equipment required to cool, pump, and clean oil for a typical thrust bearing is eliminated by taking advantage of the turbomachinery’s working fluid as bearing lubricant. The benefit of removing such auxiliary equipment is obvious when considering cost and weight of turbomachines, yet the working fluid of gas turbines typically has very low viscosity compared to oil which introduces load capacity and stability challenges. It is therefore necessary to build a facility capable of testing gas-lubricated thrust bearings to advance the technology. The test rig design in this work allows for 7 to 15 inch (180–380 mm) diameter thrust bearings, static loads up to 30,000 lbf (135 kN), and speeds up to 20 krpm. The test facility also provides up to 500 psig (3.45 MPa) static air pressure to enable testing of hydrostatic and hybrid (hydrodynamic combined with hydrostatic) bearings. This paper describes the test rig operating principle, details experimental procedures to obtain measurements, and provides test results necessary to prove the test rig concept by means of a hybrid gas bearing.

Evaluation of Dynamic Loads due to Steam Condensation in Boiling Water Reactor ABWR Containment

2014 ◽  
Author(s):  
Tsutomu Shioyama ◽  
Masashi Nakane ◽  
Takuya Miyagawa ◽  
Makoto Ukai ◽  
Masanobu Watanabe ◽  
...  
Keyword(s):  
General Purpose ◽  
Boiling Water ◽  
Test Facility ◽  
Confirmatory Test ◽  
Boiling Water Reactor ◽  
Steam Condensation ◽  
Hydrodynamic Loads ◽  
Water Reactor ◽  
Calculation Results ◽  
Test Pressure

The purpose of this study is to identify hydrodynamic loads due to steam condensation acting on the Suppression Pool (S/P) in Primary Containment Vessel (PCV) of Advanced-Boiling Water Reactor (ABWR) by using general-purpose analysis code, ANSYS™. The source load methodology has been used to evaluate the hydrodynamic loads, which are classified into condensation oscillation (CO) and chugging (CH). When setting the design source from the confirmation test, the calculation method due to the eigenfunction of the cylindrical coordinate system was used. Since, there were various limitations in the previous approaches, a new analysis approach has been expected. In this study, the pool of ABWR horizontal-vent confirmatory test facility is modeled with the ANSYS™ acoustic elements. The calculation results are in good agreement with the test pressure oscillations. It is confirmed that the proposed approach can create the design source enveloping the PSD of test results.

An active vacuum general-purpose radiation test facility for assessment of ceramic insulators and diagnostic components

2007 ◽  
Vol 82 (15-24) ◽  
pp. 2531-2535 ◽  
Author(s):  
H. Ooms ◽  
E. Hodgson ◽  
M. Decréton ◽  
B. Brichard ◽  
S. Hendrickx ◽  
...  
Keyword(s):  
General Purpose ◽  
Test Facility ◽  
Radiation Test ◽  
Ceramic Insulators

A General Purpose Test Facility for Evaluating Gas Lubricated Journal Bearings

2008 ◽  
Vol 131 (2) ◽  
Author(s):  
B. Ertas ◽  
M. Drexel ◽  
J. Van Dam ◽  
D. Hallman
Keyword(s):  
Load Capacity ◽  
Aircraft Engine ◽  
General Purpose ◽  
Journal Bearings ◽  
Test Facility ◽  
Test Rig ◽  
Component Level ◽  
Simultaneous Application ◽  
Design Elements ◽  
Lift Off

The present work describes the detailed design and operational capabilities of a general purpose test facility developed to evaluate the dynamics and performance of gas lubricated journal bearings. The component level test facility was developed to serve as an initial tollgate test platform for certifying gas lubricated journal bearings into aircraft engine applications. A rotating test rig was engineered to test 70–120 mm diameter bearings at 40,000–80,000 rpm and 1200°F. The test rig described in this paper possesses design elements that enable the simultaneous application of dynamic and static load profiles of up to 1000 lb while monitoring and measuring the bearing torque. This capability allows for the characterization of several critical metrics such as bearing lift off speed characteristics, load capacity, and frequency dependent rotordynamic force coefficients. This paper discusses the functionality of the test facility and presents sample test measurements from several experiments.

Spring-Supported Thrust Bearings Used in Hydroelectric Generators: Laboratory Test Facility©

1999 ◽  
Vol 42 (1) ◽  
pp. 126-135 ◽  
Author(s):  
J. H. Yuan ◽  
J. B. Medley ◽  
J. H. Ferguson
Keyword(s):  
Laboratory Test ◽  
Test Facility ◽  
Thrust Bearings

Development of an experimental laboratory sample of foam extinguishing system using compressed air (CAFS)

2018 ◽  
Vol 1 (2) ◽  
pp. 4-9
Author(s):  
A. Nikulin ◽  
A. Kodryk ◽  
O. Titenko ◽  
V. Prysiazhniuk
Keyword(s):  
Mathematical Model ◽  
General Purpose ◽  
Compressed Air ◽  
Test Facility ◽  
Technological Parameters ◽  
Outlet Nozzle ◽  
Fire Extinguishing ◽  
Internal Interaction ◽  
Experimental Laboratory

The analysis of known structures of foam generating systems with compressed air, as well as the results of research on operational experiments, tests and research of systems carried out abroad, allowed to formulate basic principle requirements to technological and constructive parameters of foam generating systems with compressed air. The general trend in the design of various structures, especially complex, built on the internal interaction of individual structural units – is the development of a mathematical model, preceding a constructive solution and often is the calculated basis for them. The created mathematical model of the process of foaming made it possible to determine the dependence of the quality of the foam obtained on the structural and technological parameters. On the basis of the developed mathematical model of foaming, a principal scheme of the process is proposed and a small-sized test facility is created for studying the possibilities of obtaining a compression foam according to the proposed scheme. The peculiarities of the work are an attempt to obtain compression foam according to the proposed scheme with the use of domestic general purpose foam generators using the modernized existing portable fire extinguishing equipment, which is at the disposal of fire units of Ukraine. Particular attention is paid to the analysis of development of small-sized mobile and portable plants, which can be used as an addition to existing fire-fighting equipment. During the experiments, the variables were the brands and concentrations of foam generators, the magnitude of air pressure in the system, and the ratio of water to air. The dependence of the quality of the foam on the change in pressure on the outlet nozzle was established, therefore, during each experiment it was controlled and maintained constant during its conduct. As a result of previous tests, the possibility of obtaining a compression foam according to the proposed scheme with the use of synthetic domestic general purpose foam generators with the use of existing fire equipment has been confirmed. The following are ways of developing work.

Radiation Damage Studies with the HVEM

1972 ◽  
Vol 30 ◽  
pp. 680-681
Author(s):  
J. J. Laidler ◽  
B. Mastel
Keyword(s):  
Radiation Damage ◽  
Stainless Steels ◽  
Volume Expansion ◽  
Austenitic Stainless Steels ◽  
Test Facility ◽  
Fast Breeder Reactors ◽  
Breeder Reactors ◽  
Under Construction ◽  
Development Laboratory ◽  
Insight Into

One of the major materials problems encountered in the development of fast breeder reactors for commercial power generation is the phenomenon of swelling in core structural components and fuel cladding. This volume expansion, which is due to the retention of lattice vacancies by agglomeration into large polyhedral clusters (voids), may amount to ten percent or greater at goal fluences in some austenitic stainless steels. From a design standpoint, this is an undesirable situation, and it is necessary to obtain experimental confirmation that such excessive volume expansion will not occur in materials selected for core applications in the Fast Flux Test Facility, the prototypic LMFBR now under construction at the Hanford Engineering Development Laboratory (HEDL). The HEDL JEM-1000 1 MeV electron microscope is being used to provide an insight into trends of radiation damage accumulation in stainless steels, since it is possible to produce atom displacements at an accelerated rate with 1 MeV electrons, while the specimen is under continuous observation.

Sign in / Sign up

Export Citation Format

Share Document