And the relationship between reaction height and conversion ratio is es tablished according to the mass transfer coefficient,different causes of qualit y of a product are analyzed,and dif.

According to the theory of acoustic gravity waves caused by an impulisive point source in the middle atmosphere and the interaction between electrons and neutral particles,an expression among the parameters of additive electronic density,the rate of additive electronic density with time,reflection height and Doppler shift is obtained under the condition of small disturbance.

Low-Reaction & High-Loaded Axial Aspirated Compressor;

There is introduced a new low-reaction, highly-loaded axial compressor design concept which is coupled with boundary layer suc- tion method.

In order to design a high pressure ratio and high-loaded axial flow compressor,we introduce a low-reaction compressor design method.

In this paper, the existing thermal performance calculating methods for steam turbines at off-design conditions and the analytical expression for degree of reaction are improved.