The reason of end fingers loosening and winding grounding in stator core of hydr ogenerator were introduced in this paper.

Effects of AP content and granularity gradation on pressure exponent of boron-based fuel-rich propellant;

By means of coupled DSC-TG and burning rate measurement methods,some burning rate modifiers such as nano-PbO,QC,C,SEA,Fe2O3 and Co3O4 were selected to reduce the pressure exponent of CMDB propellant and AP composite propellant,moreover their effects on combustion properties of NEPE propellant were discussed.

In order to obtain the main factors affecting the pressure exponent of boron-based fuel-rich propellant,propellant samples were prepared via mix of the compositions in mixing machine,pouring in vacuum and curing at constant temperature.

To investigate from micro angles the effects of NGu on the pressure exponent change of burning rate of nitramine propellant containing RDX,the quenched experiments of gun propellants with RDX and NGu were carried out by rapid chamber depressurization in an ignition-and-combustion simulator under the pressure about 35 MPa.

The effect of CL-20, AP, Al power and combustion catalyst on combustion properties (burning rate and pressure exponent)of CL-20-NEPE propellant was studied with designed formulation [NB(PEG/NG/N-100/C2),NB/CL-20,NB/CL-20/AP,NB/CL-20/AP/Al,NB/CL-20/AP/Al/Ct] , in which the ingredients are added one by one, and compared with that of RDX-NEPE propellant.

particle size of AP,catalysts on burning rate and pressure exponent were discussed.

0,the ring crush index of the handsheet is increased by 69.

The results show that ring crush index can be increased by 22.

65%,and the ring crush index improved by 42% with the addition of modified PEI.

Application and comparison of soil compaction indexes in the evaluation of urban soils;