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Abstract: Based on the statistics of aeroengine database and a great number of computational researches,the technical approarches to increasing engine thrust weight ratio are considered.Due to aerodynamic and thermodynamic progress, such as increasing T 4 and component's efficiencies and decreasing turbine cooling air with the help of adequate materials and advanced technology,engine thrust weight ratio may reach 12～13.By means of improving the design techniques of engine parts,such as decreasing stage number of compressor,based on applying blisk and high paththrough design,the engine thrust weight ratio can rise up to 14.It may be 15 only based on metal and nonmetal composites with high strength and low specific weight.
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