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Full-Text Articles in Engineering
Fiber-Optic Temperature Sensor Based On Interference Of Selective Higher-Order Modes, Enbang Li, X L Wang, Chao Zhang
Fiber-Optic Temperature Sensor Based On Interference Of Selective Higher-Order Modes, Enbang Li, X L Wang, Chao Zhang
Faculty of Engineering - Papers (Archive)
A fiber-optic temperature sensor based on the interference of selective higher-order modes in circular optical fibers is described. The authors demonstrate that by coupling the LP01 mode in a standard single-mode fiber to the LP0m modes in a multimode fiber, and utilizing the interference of the higher-order modes, a fiber-optic temperature sensor which has an extremely simple structure and is suitable for high-temperature measurements can be constructed. The sensing principle, temperature measurement experiments, and results are presented.
High-Temperature Creep-Deformation Behavior Of The Ni-Based Superalloy M963, Hongtao Zhu, Cheng Lu, A K. Tieu, Lizi He, Q. Zheng, X. F. Sun, Z. Q. Hu, H. R. Guan
High-Temperature Creep-Deformation Behavior Of The Ni-Based Superalloy M963, Hongtao Zhu, Cheng Lu, A K. Tieu, Lizi He, Q. Zheng, X. F. Sun, Z. Q. Hu, H. R. Guan
Faculty of Engineering - Papers (Archive)
The high-temperature creep-deformation behavior of a Ni-based M963 superalloy has been investigated over a broad stress range of 80 to 600 MPa at high temperatures (800 °C to 975 °C). The detailed dislocation configurations at different creep stages are examined through transmission electron microscopy (TEM). The results show that the deformation mechanism is stress and temperature dependent and mainly consists of three dislocation-controlling mechanisms: stacking faults and dislocation-pair shearing, dislocation bowing and Orowan looping, and dislocation climb.
Thermal Diffusivity Of Iron At High Temperature In Both The Liquid And Solid States, Brian J. Monaghan, P N Quested
Thermal Diffusivity Of Iron At High Temperature In Both The Liquid And Solid States, Brian J. Monaghan, P N Quested
Faculty of Engineering - Papers (Archive)
Process models that simulate industrial processes are increasingly being used to reduce costs and improve productivity. 1–8) The success of such models is highly dependent on the thermophysical property data used in the simulation calculations. Unfortunately high temperature thermophysical data for liquid metals and slags are scarce. Also what data that are available often have a high uncertainty associated with them.1,2,9–11) Therefore regardless of how well a process model may be physically based it is likely, given the current state of high temperature thermophysical property data, in particular heat capacity, viscosity and thermal conductivity/ diffusivity, that the models predictions will …
The Quantum Theory For Anomalous Low-Temperature Thermal Conductivity Of Noncrystalline Dielectric Solids, W L. Zhao, B L. Zhou
The Quantum Theory For Anomalous Low-Temperature Thermal Conductivity Of Noncrystalline Dielectric Solids, W L. Zhao, B L. Zhou
Faculty of Engineering - Papers (Archive)
We discuss the interaction between two-level systems and the phonon field in noncrystalline dielectric solids, and we calculate the quantum transition matrix elements ofsuch an interaction. After studying the Boltzmann equation for phonon transport. we obtain the phonon distribution function. From a direct calculation of the heat current, and as a result of obtaining the thermal conductivity of non-crystalline dielectric solids, the P relation is obtained.