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A study of coal particle shape and three-body wear: Part 1, Design and development of a new three-body wear testing machine: Part 2, Particle shape and three-body wear

Description: Three-body wear involves two surfaces and an intermediate particle trapped between the two surfaces. A machine has been constructed to measure normal and frictional forces due to three-body wear. This machine accurately positions specimens a predetermined distance apart from each other and introduces particles to the interface between the specimens. Different types of specimen combinations have been tested to give a variety of data. Loads that result from the wear test are sampled and stored. W… more
Date: January 1, 1991
Creator: Clark, N.N.; Means, K.H.; James, R. & Thompson, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparisons of computed and measured three-dimensional velocity fields in a motored two-stroke engine

Description: Computer simulations are compared with measurements of the three-dimensional, unsteady scavenging flows of a motored two-stroke engine. Laser Doppler velocimetry measurements were made on a modified Suzuki DT-85 ported engine. Calculations were performed using KIVA-3, a computer program that efficiently solves the intake and exhaust port flows along with those in the cylinder. Measured and computed cylinder pressures and velocities are compared. Pressures agree well over the cycle as do the vel… more
Date: January 1, 1991
Creator: Amsden, A. A.; O'Rourke, P. J.; Butler, T. D. (Los Alamos National Lab., NM (United States)); Meintjes, K. & Fansler, T. D. (General Motors Research Labs., Warren, MI (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent improvements in check valve monitoring methods

Description: In support of the NRC Nuclear Plant Aging Research (NPAR) program, ORNL has carried out an evaluation of three check valve monitoring methods: acoustic emission, ultrasonic inspection, and magnetic flux signature analysis (MFSA). This work has focussed on determining the capabilities of each method to provide diagnostic information useful in determining check valve aging and service wear effects (degradation) and undesirable operating modes. In addition, as part of the ORNL Advanced Diagnostic … more
Date: January 1, 1991
Creator: Haynes, H. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evaluation of NRC maintenance team inspection reports for managing aging

Description: A nuclear power plant's maintenance program is the principal vehicle through which age-related degradation is managed. Over the past two years, the NRC (Nuclear Regulatory Commission) has evaluated the maintenance program of every nuclear power plant in the U.S. The reports issued on these in-depth team inspections have been reviewed to ascertain the strengths and weaknesses of the programs as related to the need to understand and manage the effects of aging on nuclear power plant systems, stru… more
Date: January 1, 1991
Creator: Fresco, A. & Gunther, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Low heat rejection diesel ceramic coupon tests

Description: Results are reported from studies in which several monolithic ceramic materials in the form of modulus-of-rupture bars were exposed for 100 h to the combustion conditions found in either a small single- or two-cylinder diesel engine. Fuels included a standard Phillips D-2 diesel or synthetic mixture of the Phillips D-2 and an aromatic blend. The ceramics included two commercial grades of partially stabilized zirconia (PSZ-TS and PSZ-MS), silicon nitride (GTE WESGO SNW-1000 and Norton NT-154), a… more
Date: January 1, 1991
Creator: Brinkman, C.R.; Liu, K.C.; Graves, R.L. & West, B.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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NDE (nondestructive examination) development for ceramics for advanced heat engines

Description: The Department of Energy (DOE) Ceramic Technology for Advanced Heat Engines (CTAHE) project was initiated in 1983 to meet the ceramic technology needs of DOE's advanced heat engines programs (i.e., advanced gas turbines and low heat rejection diesels). The objective is to establish an industrial ceramic technology base for reliable and cost-effective high-temperature components. Reliability of ceramics was recognized as the major technology need. To increase the material reliability of current … more
Date: January 1, 1991
Creator: McClung, R.W. (McClung (R.W.), Powell, TN (USA)) & Johnson, D.R. (Oak Ridge National Lab., TN (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement and Modeling of Advanced Coal Conversion Processes

Description: The overall objective of this program is the development of predictive capability for the design, scale up, simulation, control and feedstock evaluation in advanced coal conversion devices. This program will merge significant advances made in measuring and quantitatively describing the mechanisms in coal conversion behavior. Comprehensive computer codes for mechanistic modeling of entrained-bed gasification. Additional capabilities in predicting pollutant formation will be implemented and the t… more
Date: January 1, 1991
Creator: Solomon, P. R.; Serio, M. A.; Hamblen, D. G.; Smoot, L. D. & Brewster, B. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement and Modeling of Advanced Coal Conversion Processes

Description: The objective of this study are to establish the mechanisms and rates of basic steps in coal conversion processes, to integrate and incorporate this information into comprehensive computer models for coal conversion processes, to evaluate these models and to apply them to gasification, mild gasification and combustion in heat engines.
Date: January 1, 1991
Creator: Solomon, P. R.; Serio, M.A.; Hamblen, D. G.; Smoot, L. D. & Brewster, B. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Four-wheel-drive powertrain models for real-time simulation

Description: Dynamic vehicle powertrain models have been formulated by many researchers for particular applications, mainly the analysis of powertrain characteristics or vibration. In this paper, we formulate models of four-wheel-drive vehicle powertrains for the purpose of real-time simulation. While not encompassing the complete characteristics of powertrain operation, these models are applicable for use in vehicle simulators, and include both the differential and lock-up modes of four-wheel-drive transfe… more
Date: January 1, 1991
Creator: Freeman, J.S. (Los Alamos National Lab., NM (United States)) & Velinsky, S.A. (California Univ., Davis, CA (United States). Dept. of Mechanical Engineering)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Status of the Advanced Stirling Conversion System Project for 25 kW dish Stirling applications

Description: Under the Department of Energy's (DOE) Solar Thermal Technology Program, Sandia National Laboratories is evaluating heat engines for terrestrial Solar Heat Receivers. The Stirling engine has been identified by Sandia as one of the most promising heat engines for terrestrial applications. The Stirling engine also has the potential to meet DOE's performance and cost goals. The NASA Lewis Research Center is conducting technology development for Stirling convertors directed toward a dynamic power s… more
Date: January 1, 1991
Creator: Shaltens, R.K. & Schreiber, J.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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