Characteristics of rotor blade tip clearance flow in axial compressors can significantly affect their performance and stable operation. It may also increase blade vibrations and cause detrimental noises. Therefore, this paper is contributed to investigate tip leakage flow in a low speed isolated axial compressor rotor blades row. Simulations are carried out on near-stall condition, which is val...

Buoyancy-driven displacement natural ventilation in a simple multi-storey building structure is investigated. The storeys are connected to a common atrium and top-down-chimneys, and the internal heat gains of the storeys are represented by localised point heat sources on each floor. The heat sources generate thermal plumes which entrain the surrounding air and transport warm air upwards. Simple...

The direct interaction approximation (DIA), due to Kraichnan [1], was the first field-theoretical approach to the theory of turbulence. Formulated in terms of the Dyson equation, the DIA is characterized as the lowest-order approximation that includes nonlinear corrections to the propagator for the mode v(k,a>). It was shown [1] that, in the inertial range, the DIA gives the energy spectrum is ...

Climate change as a worldwide phenomenon is the cause of multinational agreements such Kyoto Protocol and Paris Agreement with goal reducing greenhouse gas emissions. Biogas one most promising biofuels for integration clean energy sources; however, biogas has disadvantage low calorific value. To overcome this problem, mechanical devices swirlers are implemented in combustion chambers (CCs) to i...

The key issue associated with the industries is transportation and dumping of solids particulates in form slurry at desired place using long length pipelines. In this perspective, numerical simulation three-dimensional horizontal pipeline 0.0549 m diameter Eulerian two-phase model RNG k-ɛ turbulence closure carried out. glass - beads solid having density ( = 2470 kg/m3) concentration varies as ...

Matrix Exponential (ME) probability distributions form a versatile family of distributions and enable an accurate description and simulation of a wide variety of situations where a positive distribution is required. In queueing theory they are used for arrival and service processes. Random Number Generators (RNG) for ME’s are not commonly available. In this work, we create a new ME RNG by scali...

Regenerative cooling of aviation kerosene plays an important role for thermal protection of scramjet engines. Since the thermophysical properties of kerosene change acutely near the pseudo-critical point, heat convective in kerosene pipe flow is complicated. Here the convective heat transfer characteristics of China RP-3 aviation kerosene at a supercritical pressure are numerically studied usin...

The flow in the vertical long-axis fire pump exhibits complex, three-dimensional, unsteady features. In an attempt to understand effects of turbulence models on mechanism and performance characteristics pump, ANSYS CFX software was used carry out numerical studies using URANS. main objective this study investigate dynamics within influence applying different computational models. then sought co...