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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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At least 109 records · Page 6

El Nino and La Nina Events Simulated by the Cane and Zebiak's Model and Observed with Satellite or in situ Data

The Zebiak and Cane (1987) model is first run in its 'forced mode' where the oceanic part of the model is driven by FSU wind stress anomalies over 1980-1994 to simulate sea surface temperature anomalies and those are used in the atmospheric part of the model to generate wind anomalies. Simulated thermocline depths, sea surface temperature and wind stress anomalies are first validated with observations.

climate research sea temperature sea wind El Nino ↗

Hybrid rocket propulsion <la propulsion par fusees hybrides<

The aim of the first part of this article is to demonstrate the potentialities of hybrids in the space program. These potentialities are applicable to all three main classes of chemical rockets currently in use, namely: (1) storable -propellant rockets, (2) cryogenic-propellant rockets, and (3) semistorable-propellant rockets, where the non-storable element is introduced at the time of firing. On the basis of these three categories, the properties of hybrid systems are discussed in relation to the specific impulse. The hybrid method of propulsion is compared with standard solid- and liquid-propellant propulsion systems. The second part of the article is concerned with the fundamental problems of combustion, the emphasis being placed on the rate of regression of the solid phase, which determines the performance of the system. Different theories of the regression rate are described and compared with various experimental results.

Cryogenic propellant↗