摘要:

Soot formation in the gas turbine combustors has serious effects on liner durability, carbon deposition and smoke emission.

ISSN:0884-3759    

DOI:10.1080/08843758708915859

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

This paper documents and analyzes recent trends in Federal energy research and development programs. In light of the marketplace philosophy of the present Administration, the possible benefits of a strong Federal research program versus the potential advantages of relying on private sector research programs to develop new technology alternatives are analyzed in some detail. The impacts of the Reagan budget cuts and other initiatives on several major energy programs, including nuclear power, photovoltaics, and conservation, are also analyzed. This analysis reveals some of the difficulties inherent in attempting to project the consequences of particular policy decisions in a complex and changing environment, and identifies some of the problems of trying to evaluate the success of particular programs or actions on a limited time scale.

ISSN:0884-3759    

DOI:10.1080/08843758708915860

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

A method of burning porous solid fuels in a fixed bed and in pellet or chunk form is described wherein compressing the fuel with air forces oxygen deep into the fuel pores where primary reaction occurs. Subsequent expansion brings the primary re action gases out of the fuel pores where secondary reaction with additional oxygen can occur. Useful mechanical work can be produced by carrying out this compression-reaction-expansion process within a piston engine or within a gas turbine engine. Maximum useable engine speeds are not limited by burning rates but by pressure drop due to gas flow into and out of the fuel pores. Approximate thermal efficiency relations are presented which show the piston engine process to be less efficient than the turbine engine process due to incomplete expansion in the piston engine. Engines using this cyclic porous burning are somewhat less efficient than engines using constant volume burning at minimum volume, as in Otto engines, or constant pressure burning at maximum pressure as in Brayton engines. This latter efficiency difference is due to the cyclic burning being distributed throughout the compression and expansion rather than occurring all at the end of compression.

ISSN:0884-3759    

DOI:10.1080/08843758708915861

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

The dependence of the cetane number of hydrotreated light cycle oil on chemical composition has been investigated. Cetane number was related to hydrogen content and aromaticity. The latter was determined by high performance liquid chromatography and also by carbon-13 n.m.r. spectroscopy. Specific correlations were developed in each case and a regression coefficient of 0.99 and a standard error of 1.25 were obtained for the best case. The usefulness of predicting cetane number from fuel composition is discussed.

ISSN:0884-3759    

DOI:10.1080/08843758708915862

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor