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This paper is concerned with the forced convective heat transfer of dilute liquid suspensions of nanoparticles (nanofluids) flowing through a straight pipe under laminar conditions. Stable nanofluids are formulated by using the high shear mixing and ultrasonication methods. They are then characterised for their size, surface charge, thermal and rheological properties and tested for their convective heat transfer behaviour. Mathematical modelling is performed to simulate the convective heat transfer of nanofluids using a single phase flow model and considering nanofluids as both Newtonian and non-Newtonian fluid. Both experiments and mathematical modelling show that nanofluids can substantially enhance the convective heat transfer. Analyses of the results suggest that the non-Newtonian character of nanofluids influences the overall enhancement, especially for nanofluids with an obvious non-Newtonian character.

This article presents an investigation on the flow and heat transfer process of a gas turbine fuel nozzle with double channel. The fuel which is influenced by low flow velocity and high-temperature air around nozzle has high probability of coke deposition. The coke deposition problem is related with fuel temperature which is determined by flow and heat transfer process. A three-dimensional fluid-thermal-solid interaction numerical simulation solution is applied to acquire the temperature distribution characteristic in fuel nozzle. The numerical simulation result shows that the flow parameters of both air and flue have influence on the temperature distribution characteristic in fuel nozzle.

This article presents an investigation on the flow characteristics of the air in complex probe. The flow fields around the complex probe in different Mach numbers is simulated to analysis the relation between flow field structure and text parameters. The investigation on complex probe shows that the Mach numbers has influence on the characteristic of complex probe. The flow field around the probe and shock wave distribution transform with the change of Mach number. The calibrate coefficient has disparate transformation law in subsonic speed flow field, near-sonic speed flow field and supersonic speed flow field.