Critical Reynolds number for sinusoidal flow of water in rigid tubes.
Experimental friction factor for pulsatile water flow, obtaining empirically pressure drop and flow rate data
Hershey, D.↗
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Results for “RIGIDITY”
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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Techniques for analysis of linear multichannel control of non-rigid spacecraft
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Klumpp, A. R.↗
Orbital and rotational motion of a rigid satellite
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Lundquist, C. A.↗
Identification of moving magnetic field lines. Part 2 - Application to a moving, non-rigid conductor
Moving magnetic field line identification for predicting particle motion on conducting surface
Birmingham, T. J.↗
Rigid open-cell polyurethane foam for cryogenic insulation
Lightweight polyurethane foam assembled in panels is effective spacer material for construction of self-evacuating multilayer insulation panels for cryogenic liquid tanks. Spacer material separates radiation shields with barrier that minimizes conductive and convective heat transfer between shields.
Faddoul, J. R.↗
Dynamic response of viscous compressible fluids in rigid tubes
Data on experimental verification of Iberall's analysis applies to such problems as pressure sensing, pneumatic control circuits with bellows, measuring irregular shaped volumes, and transmitting fluid power by pulsating flow.
Goldschmied, F. R.↗
Multi-rigid body attitude dynamics simulation
Dynamic formalism and computer program for multiple space vehicle attitude and control simulations
Fleischer, G. E.↗
Molecular collisions. 15 - Classical limit of the generalized phase shift treatment of rotational excitation - Atom-rigid rotor
Generalized phase shift approach to problem of rotationally inelastic molecular collisions
Bernstein, R. B.↗
Classical study of rotational excitation of a rigid rotor: Li+ plus H2
Classical trajectory study of rotationally inelastic scattering of hydrogen molecules by collisions with lithium ions
La Budde, R. A.↗
Advanced structural geometry studies. Part 2: A geometric transformation concept for expanding rigid structures
Development of expandable structures concepts for application to structures used in space missions - Part 2
Clinton, J. D.↗
Six degrees of freedom equations of motion and trajectory equations of a rigid fin stabilized missile with variance mass
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Source record↗
Bending of skew plates of variable rigidity.
Description of an analytical procedure for studying the bending of thin skew plates of a thickness varying in one direction, under arbitrary lateral loading. The analysis was programmed for execution on an electronic computer for various conditions and types of loading. The results obtained suggest that the proposed analytical procedure is more accurate than the finite-difference technique used in earlier investigations.
Willems, N.↗
Strain arrestor plate for mounting rigid insulating tiles
Plate is made of material having coefficient to thermal expansion similar to that of insulating material. Although plate may be formed from appropriate alloy, it has been found that a combination of graphite fibers in epoxy resin is satisfactory and much lighter in weight.
Kural, M. H.↗
The structure of shock wave in a gas consisting of ideally elastic, rigid spherical molecules
Principal approaches are examined to the theoretical study of the shock layer structure. The choice of a molecular model is discussed and three procedures are formulated. These include a numerical calculation method, solution of the kinetic relaxation equation, and solution of the Boltzmann equation.
Cheremisin, F. G.↗
Further comments on the application of the method of averaging to the study of the rotational motions of a triaxial rigid body, part 2
The second and final step in the development of first-order secular solutions to rotational motions of triaxial bodies is presented.
Liu, J. J. F.↗
Processing of Rigidized Rei-mullite Insulative Composites
Systematic development and evaluation of ceramic fiber Mullite are summarized: (1) Major reductions in thermal protection system weight have been achieved by reducing the density and thermal conductivity of the insulation by 20 and 25 percent; (2) already adequate structural margins-of-safety have been greatly enhanced by increasing the tensile strength and strain-to-failure capabilities of the insulation by factors of 3 and 2; (3) cost effectiveness has been increased through the achievement of a high degree of uniformity and reproducibility of properties and through process simplification and binder modifications; and (4) maximization of multimission capability at surface temperatures of 1644 K has been achieved through firing cycle adjustments and the development of a material with high dimensional stability.
Gebhardt, J. J.↗
Environmental compatibility of the all-silica rigid surface insulation
Testing has demonstrated the compatibility of the all-silica surface insulation system to a variety of space shuttle orbiter environmental aspects for launch, on-orbit, and special reentry conditions. Among the more important results are the success of the cold soak tests, which indicate the suitability of the foam/bond attachment system with a 2 mm thick foam pad for strain isolation, and the reentry temperature overshoot tests (to 1924 K), which show that this system can tolerate considerable dispersion in reentry heating environment.
Housten, S. J.↗
A Non Rigid Reusable Surface Insulation Concept for the Space Shuttle Thermal Protection System
A reusable thermal protection system concept was developed for the space shuttle that utilizes a flexible, woven ceramic mat insulation beneath an aerodynamic skin and moisture barrier consisting of either a dense ceramic coating or a super alloy metallic foil. The resulting heat shield material has unique structural characteristics. The shear modulus of the woven mat is very low such that bending and membrane loads introduced into the underlying structural panel remain isolated from the surface skin.
Alexander, J. G.↗