SEARCH · Engineering Papers

Results for “IMPELLERS”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

SourceResearch connectionFrom yearThrough year

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 109 records · Page 6

All sources NASA NTRS DOE OSTI

NASA NTRS2007

Creep Property Characterization of Potential Brayton Cycle Impeller and Duct Materials

Cast superalloys have potential applications in space as impellers within closed-loop Brayton cycle nuclear power generation systems. Likewise wrought superalloys are good candidates for ducts and heat exchangers transporting the inert working gas in a Brayton-based power plant. Two cast superalloys, Mar-M247LC and IN792, and a NASA GRC powder metallurgy superalloy, LSHR, have been screened to compare their respective capabilities for impeller applications. Mar-M247LC has been selected for additional long term evaluations. Initial tests in helium indicate this inert environment may debit long term creep resistance of this alloy. Several wrought superalloys including Hastelloy(Registered TradeMark) X, Inconel(Registered TradeMark) 617, Inconel(Registered TradeMark) 740, Nimonic(Registered TradeMark) 263, Incoloy(Registered TradeMark) MA956, and Haynes 230 are also being screened to compare their capabilities for duct applications. Haynes 230 has been selected for additional long term evaluations. Initial tests in helium are just underway for this alloy. These proposed applications would require sufficient strength and creep resistance for long term service at temperatures up to 1200 K, with service times to 100,000 h or more. Therefore, long term microstructural stability is also being screened.

Gabb, Timothy P.↗

NASA NTRS1963

METHOD FOR DESIGN OF PUMP IMPELLERS USING A HIGH-SPEED DIGITAL COMPUTER

Design of pump impellers using digital computer

PUMP↗

NASA NTRS1965

Investigation of Pressure Prediction Methods for Radial Flow Impellers, Phase II Final Report, Mar. 1964 - Feb. 1965

Pressure distribution prediction methods for low flow radial impellers

PRESSURE DISTRIBUTION↗

NASA NTRS1965

Investigation of cavitation damage of a mechanical pump impeller in high temperature potassium quarterly progress report no. 1, 7 dec. 1964 - 28 feb. 1965

Cavitation damage prediction from mixed flow centrifugal pump impeller in endurance testing in high temperature potassium

CAVITATION↗

NASA NTRS1964

Investigation of cavitation damage of mechanical pump impellers operating in liquid metal space power loops quarterly progress report no. 3, jan. 2 - mar. 31, 1964

Cavitation damage of mechanical pump impellers of liquid metal space power loops

PUMP IMPELLER↗

NASA NTRS1965

Investigation of cavitation damage of a mechanical pump impeller in high temperature potassium quarterly progress report no. 2, 1 mar. - 2 jul. 1965

Cavitation damage of turbopump impeller in high temperature potassium

CAVITATION↗

NASA NTRS1965

A study of pressure prediction methods for radical flow impellers, phase III Quarterly report no. 1

Pressure prediction methods for radial flow impellers

RADIAL FLOW↗

NASA NTRS1966

Investigation of pressure predication methods for low flow radial impellers, phase III FINAL report, Jun. 1963 - Feb. 1966

Pressure predication methods for low flow radial impellers using Fortran program

PREDICTION THEORY↗

NASA NTRS1968

Fabrication techniques for shrouded titanium impeller Quarterly progress report, period ending 31 Mar. 1968

Fabrication techniques for shrouded titanium impeller

Edlebeck, N. A.↗

NASA NTRS1968

Fabrication techniques for shrouded titanium impeller Quarterly progress report, period ending 31 Dec. 1967

Detailed design drawings and bonding techniques for shrouded titanium impeller

Edlebeck, N. A.↗

NASA NTRS1968

Detailed performance of a radial-bladed centrifugal pump impeller in water

Performance of centrifugal pump impeller in room temperature water

Miller, M. J.↗

NASA NTRS1968

Visual observations of flow through a radial-bladed centrifugal impeller

Visual observations to find flow distribution and coefficients through radial bladed centrifugal pump impeller

Miller, M. J.↗

NASA NTRS1969

Investigation of flow range and stability of three inducer-impeller pump combinations operating in liquid hydrogen

Impeller matching effects on flow range and stability operating in liquid hydrogen

Urasek, D. C.↗

NASA NTRS1969

Design, fabrication and testing of a destratification motor-impeller unit Final report, period ending 15 Feb. 1969

Design and testing of destratification motor impeller unit for liquid oxygen handling

Hamm, J. R.↗

NASA NTRS1969

Fabrication techniques for shrouded titanium impeller Final report, 29 Jun. 1967 - 30 Sep. 1969

Fabrication techniques for shrouded titanium impeller

Wolf, J. E.↗

NASA NTRS1971

Titanium pump impeller testing Final report

Ceramic stresscoat burst and performance test of shrouded, diffusion welded titanium pump impellers for liquid hydrogen pump applications

Wolf, J. E.↗

NASA NTRS1971

Titanium pump impeller fabrication and testing

Design, fabrication, and testing of improved titanium impeller for high pressure liquid hydrogen pumps

Wolf, J. E.↗

NASA NTRS1974

Impeller blade design method for centrifugal compressors

The design of a centrifugal impeller with blades that are aerodynamically efficient, easy to manufacture, and mechanically sound is discussed. The blade design method described here satisfies the first two criteria and with a judicious choice of certain variables will also satisfy stress considerations. The blade shape is generated by specifying surface velocity distributions and consists of straight-line elements that connect points at hub and shroud. The method may be used to design radially elemented and backward-swept blades. The background, a brief account of the theory, and a sample design are described.

Jansen, W.↗