نتایج جستجو برای: thermal variations
تعداد نتایج: 399619 فیلتر نتایج به سال:
The behavior of composites depends crucially on the distribution of local elds. The ways to characterize and nd such distributions are poorly understood. In this paper, an attempt is made to present some simple approximate formulas for distributions of the local elds in variational problems. They are given in an explicit form for thermo-elastic composites and heat-conducting composites. The ...
In this paper, the homotopy method is used for stress analysis of rotating disk subjected to thermal load in marine gas turbine engine. Apply the thermal loading on the disk with exponential thickness distribution by using the homotopy method and Considering the physical and mechanical properties variations with temperature, are the most important aspects of innovation in this paper. Disc thick...
this study is considering a micropolar fluid flow over a porous stretching sheet in the presence of thermal radiation and uniform magnetic field. the effects of local variation in thermal conductivity of micropolar fluid on heat transfer rate from the sheet are investigated; besides, the impacts of radiation, magnetic field and porous sheet on variations of thermal boundary layer thickness are ...
this study tried to explore disciplinary variations of web blurbs across soft and hard knowledge fields on the one hand, and to illustrate how academic publishers exploit interactional metadiscourse devices in move structure of their blurbs on the other.
We propose a novel approach based on dual filtering techniques for the detection of possible variations of the thermal properties of the spacecraft that result from variations of its physical properties and for determining a complete thermal mapping of the system. System and sensor uncertainties are taken into account in the lumped parameter modeling of the thermal system and a dual filter is r...
Evaluating the thermal effects and variations in temperature of rolling pneumatic tires, is a very important factor in safe performance of the vehicles. Normally, the transient thermal investigation of rolling tires is performed by tire test rigs. However, experimental analysis is a very time and cost consuming process and because of technical limitations, the tests cannot be carried out in mos...
thermal barrier coatings (tbcs) are used to provide thermal insulation to the hot section components of gas turbines in order to enhance the operating temperature and turbine efficiency. hot corrosion and thermal shocks are the main destructive factors in tbcs which comes as a result of oxygen and molten salt diffusion into the coating. in this thesis atmospheric plasma spraying was used to dep...
Objectives (1) Measure temperature variations achieved by common otomicroscopes. (2) Raise awareness about possible thermal injury during otologic procedures with the advent of newer, high-powered otomicroscopes. (3) Describe optical technology that aims to reduce the potential for thermal injury. Methods A variety of otomicroscopes, with different light sources (ranging from 100W halogen to 30...
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nanocrystalline zno particles were prepared by a novel sonochemical route from zinc acetate and sodium hydroxide without any requirement of calcination steps at high temperature and without surfactants. variations in several parameters and their effects on the structural (crystal size and morphology) properties of nanoparticles were investigated. characterizations were carried out by x-ray diff...
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