Abstract An unsteady model has been developed for evaluating deposition behavior and aerodynamic performance degradation under the impact of hot streak. The results reveal that streak alters force exerted by mainstream, impacting particles. For particles 1 µm, total numbers uniform inlet case, vane-aligned passage-aligned case are 431, 1244, 325 on pressure side. Hot clocking effect significantly affects particle temperature deposit formation. In mass fraction suction side increases from...

In modern industrial practice, a variety of highly exothermic reactions are promoted by contacting the reaction mixture in gaseous or vapor phase with heterogeneous catalyst. A need exists for improved catalytic structures employing integral heat exchange which will substantially widen window range operating conditions under such can be employed processes like combustion partial combustion. The process characteristics reactors investigated structures. Ethane mole fraction and gas-phase rate...

Introducing a uniform distribution of carbon nanotubes into polymer matrix can yield property enhancements that go beyond simple rule mixtures. The challenge is to take full advantage the exceptional properties in composite material. Carbon are ideal reinforcing material for matrices dur their remarkable properties. However, improvements not significant due poor interfacial bonding and severe agglomeration. present study focused primarily upon mechanical fiber-reinforced composites...

The thermal interface material technologies used for electronic packages encompass several classes of materials. However, there is still a need materials and methods making having improved conductivity property by maximizing the anisotropic benefit exfoliated graphite platelets to fullest extent. effect filler volume fraction on resistivity contact investigated carbon black. pressure bond line thickness evaluated smooth rough surfaces. present study aims provide with aligned nanofibers in...

The present study is focused primarily upon the electrical and thermal properties of epoxy matrix composite materials reinforced with multi-walled carbon nanotubes under different weight fraction conditions. Stable suspensions are achieved in water use surfactants, non-covalent covalent attachment polymers. Scanning electron microscopy characterization performed resistance measured. Mechanical studied loading rate continuously adjusted to keep a constant representative strain rate....

Many chemical processes utilize catalysts to enhance conversion behavior. A catalyst promotes the rate of but does not affect energy transformations which occur during reaction. The present study is focused primarily upon performance and efficiency analysis steam-methanol reforming in combined parallel plate heat exchanger-reactors. steady-state continuity, momentum, energy, species conservation equations are solved fluid phase equation solid using a finite volume approach. An adaptive...

Flammable mixtures of most fuels are normally burned at relatively high temperatures, which inherently results in the formation substantial emissions nitrogen oxides. In case gas turbine combustors, oxides can be greatly reduced by limiting residence time combustion products zone. However, even under these circumstances, undesirable quantities nevertheless produced. Additionally, such makes it difficult to maintain stable after ignition. The present study relates design combustors for...

Use of ethanol is attracting increasing attention both as primary feedstock and an alternative to increase the flexibility in a given unit. However, steam reforming not straight forward process. Equilibrium reaction shifted towards production hydrogen even at low temperature. practice, also converted ethylene. The present study focused primarily upon fixed-bed reactors by steam-ethanol under different temperature conditions. Computational fluid dynamics used model flow, heat mass transfer,...

In conventional thermal combustion fuel and air in inflammable proportions are contacted with an ignition source to ignite the mixture which will then continue burn. Flammable mixtures of most fuels normally burned at relatively high temperatures, inherently results formation substantial emissions nitrogen oxides. purely catalytic systems, there is little or no oxides formed a system burns low temperatures. The present study focused primarily upon characteristics small alkanes on noble metal...

Conventional methods of producing a synthesis gas are expensive and complex installations. In order to overcome the complexity expense such installations, it is proposed generate within autothermal fixed bed reactors that utilize structured catalysts different surface features heat necessary support endothermic heating requirements steam reforming reactions. The present study focused primarily upon thermal chemical reaction characteristics fixed-bed with features. capacity, conductivity,...

Endothermic reactions performed in microreactors are driven using heat from an external source. However, the temperature of gas stream providing is limited by constraints imposed materials construction. The present study focused primarily upon designs and operations integrated reactors for thermochemically producing hydrogen methanol steam reforming. A symmetry boundary condition used to model half each system where exists. Computations grids with varying nodal densities determine optimum...