Experimental validation of numerical model for turbulent flow in a tangentially fired boiler with platen reheaters

2003 ◽  
Vol 17 (1) ◽  
pp. 129-138
Author(s):  
Chang Hao Zheng ◽  
Xu Chang Xu ◽  
Jong Wook Choi
Keyword(s):  
Numerical Model ◽  
Turbulent Flow ◽  
Experimental Validation

scholarly journals Numerical model and experimental validation of the heat transfer in air cooled solar photovoltaic panel

2016 ◽  
Vol 20 (suppl. 4) ◽  
pp. 1071-1081 ◽  
Author(s):  
Senthil Ranganathan ◽  
Natarajan Elumalai ◽  
Puja Natarajan Priyadharshini
Keyword(s):  
Heat Transfer ◽  
Numerical Model ◽  
Experimental Validation ◽  
Solar Photovoltaic ◽  
Photovoltaic Panel

scholarly journals Numerical and Experimental Investigation of the Design of a Piezoelectric De-Icing System for Small Rotorcraft Part 3/3: Numerical Model and Experimental Validation of Vibration-Based De-Icing of a Flat Plate Structure

Aerospace ◽  
2020 ◽  
Vol 7 (5) ◽  
pp. 54
Author(s):  
Eric Villeneuve ◽  
Christophe Volat ◽  
Sebastian Ghinet
Keyword(s):  
Numerical Model ◽  
Flat Plate ◽  
Experimental Validation ◽  
Experimental Setup ◽  
Wind Tunnel Testing ◽  
Transient Vibration ◽  
Voltage Range ◽  
Resonant Modes ◽  
Voltage Limit ◽  
Frequency Sweeps

The objective of this research project is divided in four parts: (1) to design a piezoelectric actuator-based de-icing system integrated to a flat plate experimental setup and develop a numerical model of the system with experimental validation, (2) use the experimental setup to investigate actuator activation with frequency sweeps and transient vibration analysis, (3) add an ice layer to the numerical model and predict numerically stresses at ice breaking with experimental validation, and (4) bring the concept to a blade structure for wind tunnel testing. This paper presents the third part of the investigation in which an ice layer is added to the numerical model. Five accelerometers are installed on the flat plate to measure acceleration. Validation of the vibration amplitude predicted by the model is performed experimentally and the stresses calculated by the numerical model at cracking and delamination of the ice layer are determined. A stress limit criteria is then defined from those values for both normal stress at cracking and shear stress at delamination. As a proof of concept, the numerical model is then used to find resonant modes susceptible to generating cracking or delamination of the ice layer within the voltage limit of the piezoelectric actuators. The model also predicts a voltage range within which the ice breaking occurs. The experimental setup is used to validate positively the prediction of the numerical model.

scholarly journals CFD numerical model for open volumetric receivers with graded porosity dense wire meshes and experimental validation

2019 ◽  
Author(s):  
Antonio L. Avila-Marin ◽  
Jesús Fernandez-Reche ◽  
Cyril Caliot ◽  
Adela Martinez-Tarifa ◽  
Monica Alvarez de Lara
Keyword(s):  
Numerical Model ◽  
Experimental Validation ◽  
Wire Meshes

scholarly journals The experimental validation of a numerical model for the receptance prediction

2019 ◽  
Vol 286 ◽  
pp. 01007
Author(s):  
A. Zougari ◽  
J. MartÍnez
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Model ◽  
Experimental Validation ◽  
Parametric Design ◽  
Experimental Methodology ◽  
Railway Track ◽  
Experimental Result ◽  
Ballasted Track ◽  
Ansys Parametric Design Language

The traditional ballasted track with wooden sleepers covers today most railway lines constructions, including the tracks of tram and metro or the industrial railway branching. In this work, we present an experimental methodology to validate a numerical model based on finite element method, the model was previously well defined using the ANSYS Parametric Design Language (APDL) and adapted to represent a classical ballasted track. The obtained result of the analysis is expressed as a frequency response of the track and it is compared to the experimental result from measurements made on the metropolitan classical railway track of Barcelona.

Experimental Validation of a Numerical Model for the Simulation of Tramcar Vehicle Dynamics

2005 ◽  
Author(s):  
Federico Cheli ◽  
Roberto Corradi ◽  
Giorgio Diana ◽  
Alan Facchinetti
Keyword(s):  
Experimental Data ◽  
Numerical Model ◽  
Vehicle Dynamics ◽  
Experimental Validation ◽  
Dynamic Behaviour ◽  
Operating Conditions ◽  
Structural Configuration ◽  
Railway Vehicles ◽  
Design Solutions ◽  
Comparison With Experimental Data

Tramcar vehicles significantly differ from traditional railway vehicles both for the adopted structural configuration and design solutions and for the operating conditions. For this reason, a new numerical model specific for the analysis of tramcar dynamics has been developed by Politecnico di Milano. Before the numerical model can be adopted as a useful mean to analyse tramcar operational problems, the capability of the model to reproduce the actual tramcar dynamic behaviour has to be verified. The paper deals with the validation of the developed numerical model by means of comparison with experimental data.

scholarly journals Numerical investigation of flow characteristics over stepped spillways

2020 ◽  
Author(s):  
Aytaç Güven ◽  
Ahmed Hussein Mahmood
Keyword(s):  
Numerical Model ◽  
Turbulent Flow ◽  
Flow Characteristics ◽  
Air Entrainment ◽  
Stepped Spillway ◽  
Stepped Spillways ◽  
Entrainment Velocity ◽  
Fluid Flow Characteristics ◽  
3D Package ◽  
Good Agreement

Abstract Spillways are constructed to evacuate the flood discharge safely not to let the flood wave overtop the dam body. There are different types of spillways, ogee type being the conventional one. Stepped spillway is an example of nonconventional spillways. The turbulent flow over stepped spillway was studied numerically by using the Flow-3D package. Different fluid flow characteristics such as longitudinal flow velocity, temperature distribution, density and chemical concentration can be well simulated by Flow-3D. In this study, the influence of slope changes on flow characteristics such as air entrainment, velocity distribution and dynamic pressures distribution over the stepped spillway was modelled by Flow-3D. The results from the numerical model were compared with the experimental study done by others in the literature. Two models of the stepped spillway with different discharge for each model was simulated. The turbulent flow in the experimental model was simulated by the Renormalized Group (RNG) turbulence scheme in the numerical model. A good agreement was achieved between the numerical results and the observed ones, which were exhibited in terms of graphics and statistical tables.

Numerical model and experimental validation of the electrical and thermal performances of photovoltaic/thermal plant

2020 ◽  
Vol 220 ◽  
pp. 112939 ◽  
Author(s):  
C. El Fouas ◽  
B. Hajji ◽  
A. Gagliano ◽  
G.M. Tina ◽  
S. Aneli
Keyword(s):  
Numerical Model ◽  
Experimental Validation ◽  
Thermal Plant

Numerical Study of Air Distribution in Combustion Chamber

2016 ◽  
Vol 832 ◽  
pp. 218-223
Author(s):  
Michal Špilaček ◽  
Martin Lisý ◽  
Zdenek Skala
Keyword(s):  
Numerical Model ◽  
Turbulent Flow ◽  
Combustion Chamber ◽  
Numerical Study ◽  
Air Distribution ◽  
Secondary Combustion ◽  
Laminar And Turbulent Flow ◽  
Secondary Air

The main goal of this article is to analyze the distribution of primary and secondary combustion air in a combustion chamber. The fuel for the combustion chamber is biomass and the main characteristics the combustion chamber must meet is to be simple, reliable, cheap and ecological. A brief summary of the importance of primary and secondary air is made and then it is compared with the results from the numerical model. The numerical model is based upon a simplified chamber geometry and the results are computed for laminar and turbulent flow. From the comparison are determined flaws of the design of the combustion chamber and outlined possible solutions for their removal and further direction of the study.

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