Experimental study on bladeless turbine using incompressible working medium

Abstract

The bladeless turbine has a promising future as a new power generation system. To explore the operating characteristics of the turbine, a bladeless turbine experimental platform with an incompressible working medium was designed and built. The relationships among performance parameters were analysed in experiments, and studies were conducted on the flow characteristics of the working medium inside the turbine using numerical simulation software. The causes of entry and exit losses were analysed. The data acquired by simulation were consistent with the result of calculations using the partial loss model developed in this article, which means that this model is capable of calculating the partial loss of a bladeless turbine and is thus suitable for the design and optimization of bladeless turbines.

Energy Harvesting by a Novel Substitution for Expansion Valves: Special Focus on City Gate Stations of High-Pressure Natural Gas Pipelines

“…It means there is a specific rotational speed, which is the so-called "optimum speed", at which the TT generated power becomes the maximum. Li et al [38] also reported the same characteristic for the efficiency of a TT running with an incompressible carrier fluid in his experimental study. This optimum speed is not fixed but depends on the TT dimension (disk outer diameter), such that optimum speed decreases by increasing the disk diameter, and the magnitude of output power at the optimum point increases by decreasing the TT size.…”

“…It implies that the TT emerged from computations on articles to the real world in around only one decade. Incompressible carrier fluid were employed to establish a performance relationship with other design parameters in experimental [38] and computational [33,39] studies. Additionally, a closed-form analytical solution was extracted for 2D analysis of incompressible fluid flow through rotating discs as a simplified form of TT configuration [40].…”

Investigation of the thermal effect of a tubular permanent magnet actuator with a water cooling channel for active lateral suspension of a high-speed train

“…We performed uncertainty analysis based on the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) guidelines 22 and the literature. [23][24][25][26][27] The overall uncertainty of the convection coefficient (equation 5) was calculated based on the measured inlet water temperature (T i ), circular tube surface temperature (T s ), and water flow rate (Q); we derived error propagations (b h values) and random errors (p h values) (equation (6)). The combined standard uncertainty of propagation and random errors (multiplied by sensitivity factors) is given by equation (7).…”

Design and Experimental Assessment of Bladeless Turbines for Axial Inlet Supersonic Flows

“…Nikola Tesla introduced this concept for radial bladeless turbines in 1913, driven only by the viscous forces of the flow impinging on the rotating disks [13]. Li et al [14] recently carried out experimental and numerical work for a Tesla turbine exposed to an incompressible fluid. Neckel and Godinho [15] designed convergent-divergent nozzles for Tesla turbines using air as working fluid.…”