Hydraulic performance evaluation of a micro-turbine with counter rotating runners by experimental investigation and numerical simulation

Vagnoni, Elena; Andolfatto, Loïc; Richard, Sylvain; Münch-Alligné, Cécile; Avellan, François

doi:10.1016/j.renene.2018.04.015

Cited by 24 publications

(18 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this study, local surface meshes were adopted to achieve secondary mesh refinement for the near-wall areas of the piped carriage, in which these meshes consisted of triangular elements with a specific size of 0.001 m. The velocity gradient in the near-wall areas of both the moving boundary of the piped carriage and the static boundary of the conveying pipes varied sharply. Therefore, it was necessary that the rectangular elements were adopted to mesh the boundary layer areas [44]. The thickness of the first layer in the boundary layer areas was calculated to be 0.2537 mm (y + = 30) and the scale factor between two mesh layers was always 1.2.…”

Section: Governing Equations Of Fluid Domainmentioning

confidence: 99%

Effects of Guide Vane Placement Angle on Hydraulic Characteristics of Flow Field and Optimal Design of Hydraulic Capsule Pipelines

Zhang

Sun

et al. 2018

Water

View full text Add to dashboard Cite

With the rapid growth of agricultural trade volumes, the transportation of agricultural products has received widespread attention from society. Aiming at these problems of low transport efficiency and high transport cost in long-distance transport of agricultural products, an energy-saving and environmental-friendly transport mode of agricultural machinery-hydraulic capsule pipelines (HCPs)-was proposed. HCPs effectively solve issues like traffic congestion, energy crises, and atmospheric pollution. Published literature is mainly limited to the capsule speed and the pressure drop characteristics of the fluid within the pipelines. This research was conducted on the following four aspects of HCPs. Firstly, the structure of the carrier was improved and called a 'piped carriage'. Secondly, a coupled solution between the structural domain of the piped carriage and the fluid domain within the pipelines was numerically investigated by using the commercial CFD software ANSYS Fluent 12.0 based on the bidirectional fluid-structure interaction methods. Thirdly, the effects of guide vane placement angle on hydraulic characteristics of the internal flow field within the horizontal pipelines transporting the piped carriage were extensively evaluated. Finally, based on least-cost principle, an optimization model of HCPs was established. The results indicated that the simulated results were in good agreement with the experimental results, which further demonstrated that it was feasible to adopt the bidirectional fluid-structure interaction methods for solving the hydraulic characteristics of the internal flow field when the piped carriage was moving along the pipelines. This article will provide an abundant theoretical foundation for the rational design of HCPs and its popularization and application.

show abstract

Section: Governing Equations Of Fluid Domainmentioning

confidence: 99%

Effects of Guide Vane Placement Angle on Hydraulic Characteristics of Flow Field and Optimal Design of Hydraulic Capsule Pipelines

Zhang

Sun

et al. 2018

Water

View full text Add to dashboard Cite

show abstract

“…Furthermore, as a demonstration of the growing interest in low net heads, several works have recently been developed concerning the analysis of small hydraulic turbines considering microturbines [7], small turbines [8], and also innovative components [9].…”

Section: Introductionmentioning

confidence: 99%

Optimized Design of a Novel Hydraulic Propeller Turbine for Low Heads

Barsi

Ubaldi

Zunino

et al. 2021

Designs

View full text Add to dashboard Cite

In the present paper, an optimized design procedure capable of providing the geometry of a high efficiency compact hydraulic propeller turbine for low head is proposed and developed. The turbine preliminary design is based on fundamental turbomachinery mean-line equations and on the employment of statistical correlations, which relate the main geometrical parameters to the fundamental design parameters. The first obtained geometry represents the starting point of an automated aerodynamic single point optimization procedure based on a genetic algorithm generating and updating a wide database of turbine geometries. The approach employs a three-dimensional (3D) Reynolds averaged Navier–Stokes (RANS) solver for the construction of the corresponding database of performance. A meta-model, such as an artificial neural network (ANN), is used to speed up the design optimization process. The procedure has been applied on the practical case of a novel simplified hydraulic propeller turbine prototype for very low heads. The adopted design optimization procedure is able to modify the turbine blade and vane geometries in order to achieve automatically the targeted net head and the maximum for the total to total internal efficiency once diameter, mass flow rate, and rotational speed are assigned.

show abstract

“…Energy recovery from mini-hydro turbines with positive outlet pressure installed in transport and distribution water pipes has recently gained major attention in the scientific literature, especially when the device can supply the same function as the valves [1]. These turbines are usually pumps used in reverse mode (pumps as turbines, PATs, see [2]), bulb types [3,4], or Crossflow-type turbine [5,6], like the power recovery system (PRS) [7][8][9]. The main advantage of the PRS, with respect to the other types of turbines, is that it has the capacity for hydraulic regulation by means of a mobile flap that can change the characteristic curve of the turbine, while still maintaining good efficiencies within a large range of head jumps and flow rates (see in Figure 1 a section of the PRS normal to the turbine axis).…”

Section: Introductionmentioning

confidence: 99%

Design of Reliable and Efficient Banki-Type Turbines

Sinagra

Tucciarelli

Picone

et al. 2020

The 4th EWaS International Conference: Valuing the Water, Carbon, Ecological Footprints of Human Activities

View full text Add to dashboard Cite

A new shape for the external surface of the Crossflow turbine blades is proposed, which allows for the preservation of hydraulic efficiency in spite of a significant maximum blade thickness providing mechanic robustness and reliability. The final shape of the blades is assessed using an iterative solution for two uncoupled models: a 2D computational fluid dynamic (CFD) and a structural 3D finite element method (FEM) analysis of a single blade. Application of the proposed methodology to the design of a power recovery system (PRS) turbine, a new backpressure Crossflow-type inline turbine for pressure regulation, and energy production in a real Sicilian site follows.

show abstract

Hydraulic performance evaluation of a micro-turbine with counter rotating runners by experimental investigation and numerical simulation

Cited by 24 publications

References 15 publications

Effects of Guide Vane Placement Angle on Hydraulic Characteristics of Flow Field and Optimal Design of Hydraulic Capsule Pipelines

Effects of Guide Vane Placement Angle on Hydraulic Characteristics of Flow Field and Optimal Design of Hydraulic Capsule Pipelines

Optimized Design of a Novel Hydraulic Propeller Turbine for Low Heads

Design of Reliable and Efficient Banki-Type Turbines

Contact Info

Product

Resources

About