Kupit' tieploobmiennik Books > Environment > Download Air Traffic and the Environment — Background, Tendencies and by H.-G. Nüßer, A. Schmitt (auth.), U. Schumann (eds.) PDF

Download Air Traffic and the Environment — Background, Tendencies and by H.-G. Nüßer, A. Schmitt (auth.), U. Schumann (eds.) PDF

By H.-G. Nüßer, A. Schmitt (auth.), U. Schumann (eds.)

This quantity comprises ten papers on air site visitors and the surroundings ready through invited specialists for a seminar geared up by way of the German Aerospace learn institution (DLR) on November 15 and sixteen, 1990 in Bonn, Germany.

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Additional resources for Air Traffic and the Environment — Background, Tendencies and Potential Global Atmospheric Effects: Proceedings of a DLR International Colloquium, Bonn, Germany, November 15/16, 1990

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Considerations Regarding Use of LH2 in Aircraft, Hydrogen Technology Conference, 4/5 June 1986, NASA Lewis RC. 6] DGLR/DFVLR International Symposium, Hydrogen in Air Transportation, 1979, and Hydrogen in Air Transportation - Supplement, 1979 . [ 7] Hydrogen in air transportation ad hoc executive group, An international research and development program for LH2-fueled aircraft, July 1980. Its 8] "Pilotprojekt Airbus mit Wasserstoffantrieb" , Bölkow-Blohm, TEI55-060/89i March 1989. D. , NASP National Aerospace Plane, The Library of Congress IB 89128, October 20, 1989.

Accord1ngly, the trends in the development of engine designs and component technologies are discussed below from the point of view of their suitability for contributing to the protection of the earth 's atmosphere and the environment. 2) STATE OF THE ART IN ENGINE DEVElOPMENT Based on the above requirements and their future development, the paper first takes a look at the situation regarding operational reliability, specific fuel consumption, noise and Dollutant emissions. Concerning flight safety from the point of view of operational reliability the infli9ht shutdown rate is all-important.

INTRODUCTION In neither civilian nor military operational aviation has hydrogen had a role to date . Serious efforts have not extended beyond theoretieal and . experimental studies. Now, at the end of the 20th eentury, there are three reasons to again seriously consider the possibilities for hydrogen in avi~tion: • Conventional hydroearbons are in limited supply. Increasing seareity leads to higher prices, as already experienced as a temporary consequence of the oil crises of the 1970's. • Despite its relatively small share of anthropogenie energy consumption, only a few percent, aviation contributes to the inereasing pollution of the geosphere by residuals and toxie substances beeause this use occurs at atmospheric heights, where man is the only 24 polluter (Figure 1) .

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