A novel method of current pulse shape conditioning applied to two-phase passive compulsator

2002 ◽  
Author(s):  
Weidong Wu ◽  
Langru Li ◽  
Kefu Liu
Keyword(s):  
Current Pulse ◽  
Pulse Shape ◽  
Two Phase ◽  
Novel Method

Separation and purification of horseradish peroxidase from horseradish roots using a novel integrated method

2021 ◽  
Author(s):  
Wei Ji ◽  
Wenmei Ao ◽  
Mengqiu Sun ◽  
Chunlai Feng ◽  
Yun Wang
Keyword(s):  
Horseradish Peroxidase ◽  
Phase Extraction ◽  
Separation And Purification ◽  
Two Phase ◽  
Affinity Precipitation ◽  
Integrated Method ◽  
Novel Method ◽  
Temperature Controlled ◽  
Aqueous Two Phase Extraction

The aim of the present work was to develop a novel method integrating two-step aqueous two-phase extraction and temperature-controlled affinity precipitation for the separation and purification horseradish peroxidase (HRP) from...

High-Temperature Materials Based on Quaternary Ir-Nb-Ni-Al Alloys

2000 ◽  
Vol 646 ◽  
Author(s):  
X. Yu ◽  
Y. Yamabe-Mitarai ◽  
Y. Ro ◽  
S. Nakaza ◽  
H. Harada
Keyword(s):  
Coherent Structures ◽  
Binary Alloys ◽  
Lattice Misfit ◽  
Al Alloys ◽  
Quaternary Alloys ◽  
Rich Region ◽  
Two Phase ◽  
High Temperature Materials ◽  
Novel Method ◽  
Potential Use

ABSTRACTA novel method to develop new quaternary alloys with an fcc/L12 coherent structure is proposed. This paper reviews the development of quaternary Ir-Nb-Ni-Al alloys. The microstructure, lattice misfit, and compressive 0.2% flow stress of 15 kinds of alloys were investigated systematically. Two kinds of coherent structures, fcc/L12-Ir3Nb and fcc/ L12-Ni3Al, were observed in most alloys. Two two-phase structures, fcc+L12-Ir3Nb and fcc+L12-Ni3Al, were observed in Ir-rich and Ni-rich regions, respectively. The lattice misfits of quaternary Ir-Nb-Ni-Al alloys were higher than those of Ni- or Ir-base binary alloys. The compressive 0.2% flow stresses of quaternary alloys increased dramatically compared with those of Ni-base superalloys. The quaternary alloys located in the Ir-rich region were not only had higher strength but also better ductility than Ir-base binary alloys. The potential use of quaternary alloys is discussed.

Stability Prediction of the Nuclear Turbine Blades During Wet Steam Nonequilibrium Condensation Process

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Bing Guo ◽  
Weixiao Tang
Keyword(s):  
Turbine Blades ◽  
Condensation Process ◽  
Equivalent Stiffness ◽  
Wet Steam ◽  
Two Phase ◽  
Equivalent Damping ◽  
Novel Method ◽  
Phase Temperature ◽  
Nonequilibrium Condensation ◽  
The Stability

Stability of the nuclear turbine blades is difficult to be accurately predicted because the wet steam load (WSL) as well as its induced equivalent damping and stiffness during nonequilibrium condensation process (NECP) is hard to be directly calculated. Generally, in design, NECP is assumed as equilibrium condensation process (ECP), of which the two-phase temperature difference (PTD) between gaseous and liquid is ignored. In this paper, a novel method to calculate the WSL-induced equivalent damping and equivalent stiffness during NECP based on the combined microperturbation method (MPM) and computational fluid dynamics method (CFDM) was proposed. Once the WSL-induced equivalent damping and equivalent stiffness are determined, the stability of the blade-WSL system, of which the blade was modeled by a pretwisted airfoil cantilever beam, can then be predicted based on the Lyapunov's first method. Besides, to estimate the effects of PTD, comparisons between the WSL-induced equivalent damping and equivalent stiffness as well as the unstable area during NECP and ECP were presented. Results show that the WSL-induced equivalent damping and equivalent stiffness during NECP are more sensitive to the inlet boundary due to the irreversible heat transfer caused by PTD during NECP. Accordingly, the unstable area during NECP is about three times larger than during ECP.

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