Quick-acting backup tool for welding ducts
Alignment and backup tool facilitates butt welding of large-diameter ducts. It consists of a circular three-place segmented hoop, a pneumatic piston, and two shoes.
Johnson, L. L.↗
SEARCH · Engineering Papers
Results for “ducts”
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.
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Structural and environmental studies of acoustical duct-lining materials
Aerodynamic, acoustic, and environmental criteria for noise reducing duct liners of turbofan engines
Rucker, C. E.↗
Ground-runup tests of acoustically treated inlets and fan ducts
Ground performance tests on noise intensity of turbofan engine ducts modified by acoustic linings
Marsh, A. H.↗
Fan-duct development
Design and performance of acoustically lined fan discharge duct for noise level reduction during aircraft landing
Mc Cormick, R. B.↗
End effect in MHD ducts with non-conducting partitions
End effect in magnetohydrodynamic ducts with nonconducting partitions
Lavrentyev, I. V.↗
Characteristics of noise generated by ducted propellers and fans
Characteristics of noise generated by ducted propellers and fans
Hickey, D. H.↗
Some developments in the noise reduction in ducted propellers and fans
Developments in noise reduction in ducted propellers and fans
Hickey, D. H.↗
Use of ''FASTER'' code for significantly reducing ducted reactor shield computation time
FASTER code for significantly reducing ducted reactor shield computation time for neutron number spectrum
Jordan, T. M.↗
Turbulence in the mixing region between ducted coaxial streams
Turbulence in mixing region of ducted coaxial flow of air-air and air-Freon 12 combination
Kulik, R. A.↗
Application of integral damping for duct assembly vibration suppression Final report
Bending mode vibratory response of supported and sleeved ducts with fatigue and alloy studies
Bowie, G. E.↗
Helical duct geometry routine for the shielding computer program ''FASTER''
FASTER computer program modified for tracking neutrons through reactor slabs penetrated by helical voided ducts
Jordan, T. M.↗
Magnetospheric Duct Propagation Research Using Alouette-2 Topside-Sounder Observations
Alouette 2 sounding data for magnetospheric field aligned propagation duct model
Ramasastry, Jayaram↗
Analytical and experimental studies for predicting noise attenuation in acoustically treated ducts for turbofan engines
Analytical and experimental studies for predicting noise attenuation in acoustically treated ducts for turbofan engines
Dean, L. W., III↗
Analytical and experimental studies of the sound field in a propeller duct.
Rotating spectral and spatial sound pressure distribution in propeller duct calculated on basis of propulsion quantities, noting effect of tip clearance
Bissell, J. R.↗
Sub-Alfvenic duct flow with a nonuniform magnetic field.
Nonuniformity of magnetic field effect on steady flow of incompressible inviscid electrically conducting fluid in duct, considering Reynolds and Alfven numbers
Peyret, R.↗
Analytical investigations of incompressible turbulent swirling flow in stationary ducts.
Taylor vorticity transport theory and von Karman similarity hypothesis extended to consider three dimensional fluctuating velocity field in analyzing turbulent swirling ducted flow
Lavan, Z.↗
Monte Carlo calculations of a hemispherical duct neutron streaming experiment.
Monte Carlo method application to neutron streaming in hemispherical air-filled ducts in water tank to determine leakage through nuclear reactor shields
Clemons, L.↗
Separation and flow reversal in swirling flows in circular ducts.
Laminar flow swirling motion in circular duct, studying separation and reversal
Fejer, A. A.↗