Experimental setup and testing for verification of similarity between road-tire interaction characteristics of scaled models and full-scale vehicles

1998 ◽  
Author(s):  
Pushkin Kachroo ◽  
Kandler Smith
Keyword(s):  
Full Scale ◽  
Experimental Setup ◽  
Scaled Models

scholarly journals FIRE DYNAMICS IN FAÇADE FIRE TESTS, Measurement, modeling and repeatability

2016 ◽  
Author(s):  
Johan Anderson ◽  
Lars Boström ◽  
Robert Jansson ◽  
Bojan Milovanović
Keyword(s):  
Test Specimen ◽  
Heat Exposure ◽  
Full Scale ◽  
Experimental Setup ◽  
Fire Tests ◽  
Fire Dynamics ◽  
Test Set ◽  
Set Up

Presented is a comparison between full-scale façade tests where SP Fire 105 and BS 8414-1 were used regarding repeatability and the use of modelling to discern changes in the set-ups. Results show that the air movements around the test set-up (the wind) may have a significant impact on the tests and that the heat exposure to the façade surface will among other depend on the thickness of the test specimen. Also demonstrated was that good results could be obtained by modelling of the façade fire tests giving us the opportunity to use these methods to determine the effect of a change in the experimental setup.

scholarly journals Digital beamform simulation in anechoic chamber

2019 ◽  
Vol 30 ◽  
pp. 05003
Author(s):  
Elena Dobychina ◽  
Mikhail Snastin
Keyword(s):  
Experimental Data ◽  
Signal Processing ◽  
Full Scale ◽  
Anechoic Chamber ◽  
Experimental Setup ◽  
Moscow Aviation Institute ◽  
Scale Modeling ◽  
Spatio Temporal ◽  
Antenna Systems

The results of digital beamform simulation, principles of processing and use of the obtained experimental data are presented. Methods were developed and an experimental setup was created for full- scale modeling and measurement of the characteristics of digital antenna systems with spatio-temporal signal processing at the Scientific and Production Center for Radio Information Metrology of the Moscow Aviation Institute (SPC RIM MAI).

Experimental Setup for the Study of Runback Ice at Full Scale

2011 ◽  
Vol 48 (6) ◽  
pp. 1978-1983 ◽  
Author(s):  
N. Alègre ◽  
D. Hammond
Keyword(s):  
Full Scale ◽  
Experimental Setup

Experimental Setup for Full-Scale Testing of Pipes Under Combined Loads

2006 ◽  
Author(s):  
Istemi F. Ozkan ◽  
Magdi Mohareb
Keyword(s):  
Internal Pressure ◽  
Tensile Force ◽  
Compressive Force ◽  
Full Scale ◽  
Experimental Setup ◽  
Combined Loads ◽  
Axial Tensile ◽  
Deformational Behavior ◽  
Combined Action ◽  
The University

A versatile experimental setup was recently built at the University of Ottawa Structural Laboratory with the capability of testing full-scale pipes under load combinations involving axial tensile/compressive force, twist, shear, internal pressure, and imposed bending deformations. This paper presents the innovative aspects of the new experimental setup and documents some aspects of the deformational behavior of pipe specimen of X65 material, 20 in. OD with a diameter to thickness ratio of 80, under the combined action of internal pressure, axial tensile force, torsion, and imposed curvature, which was recently conducted under the new setup. The results reported are part of a testing program, which is currently underway.

Identification of a degradation of aerodynamic characteristics of a paraglider due to its flexibility from flight test

2019 ◽  
Vol 91 (6) ◽  
pp. 873-879 ◽  
Author(s):  
Robert Kulhánek
Keyword(s):  
High Speed ◽  
Aerodynamic Drag ◽  
Leading Edge ◽  
Flight Test ◽  
Aerodynamic Characteristics ◽  
Full Scale ◽  
Content Type ◽  
Specific Geometry ◽  
Lift And Drag ◽  
Scaled Models

Purpose Aerodynamics of paragliders is very complicated aeroelastic phenomena. The purpose of this work is to quantify the amount of aerodynamic drag related to the flexible nature of a paraglider wing. Design/methodology/approach The laboratory testing on scaled models can be very difficult because of problems in the elastic similitude of such a structure. Testing of full-scale models in a large facility with a large full-scale test section is very expensive. The degradation of aerodynamic characteristics is evaluated from flight tests of the paraglider speed polar. All aspects of the identification such as pilot and suspension lines drag and aerodynamics of spanwise chambered wings are discussed. The drag of a pilot in a harness was estimated by means of wind tunnel testing, computational fluid dynamics (CFD) solver was used to estimating smooth wing lift and drag characteristics. Findings The drag related to the flexible nature of the modern paraglider wing is within the range of 4-30 per cent of the total aerodynamic drag depending on the flight speed. From the results, it is evident that considering only the cell opening effect is sufficient at a low-speed flight. The stagnation point moves forwards towards the nose during the high speed flight. This causes more pronounced deformation of the leading edge and thus increased drag. Practical implications This paper deals with a detailed analysis of specific paraglider wing. Although the results are limited to the specific geometry, the findings help in the better understanding of the paraglider aerodynamics generally. Originality/value The data obtained in this paper are not affected by any scaling problems. There are only few experimental results in the field of paragliders on scaled models. Those results were made on simplified models at very low Reynolds number. The aerodynamic drag characteristics of the pilot in the harness with variable angles of incidence and Reynolds numbers have not yet been published.

scholarly journals How realistic are the wakes of scaled wind turbine models?

2021 ◽  
Vol 6 (3) ◽  
pp. 961-981
Author(s):  
Chengyu Wang ◽  
Filippo Campagnolo ◽  
Helena Canet ◽  
Daniel J. Barreiro ◽  
Carlo L. Bottasso
Keyword(s):  
Wind Tunnel ◽  
Wind Turbine ◽  
Inner Core ◽  
Full Scale ◽  
Scaling Analysis ◽  
Scaled Model ◽  
Eddy Simulation ◽  
The One ◽  
Scaled Models ◽  
Physical Phenomena

Abstract. The aim of this paper is to analyze to which extent wind tunnel experiments can represent the behavior of full-scale wind turbine wakes. The question is relevant because on the one hand scaled models are extensively used for wake and farm control studies, whereas on the other hand not all wake-relevant physical characteristics of a full-scale turbine can be exactly matched by a scaled model. In particular, a detailed scaling analysis reveals that the scaled model accurately represents the principal physical phenomena taking place in the outer shell of the near wake, whereas differences exist in its inner core. A large-eddy simulation actuator-line method is first validated with respect to wind tunnel measurements and then used to perform a thorough comparison of the wake at the two scales. It is concluded that, notwithstanding the existence of some mismatched effects, the scaled wake is remarkably similar to the full-scale one, except in the immediate proximity of the rotor.

Full-Scale Propulsion Measurements on a Planing Pleasure Yacht in Head Sea

2020 ◽  
Author(s):  
Riccardo Pigazzini ◽  
Fabio De Luca ◽  
Flavio Balsamo ◽  
Amedeo Migali
Keyword(s):  
Mechanical Properties ◽  
Detailed Analysis ◽  
Frequency Domain ◽  
Weather Conditions ◽  
Full Scale ◽  
System Response ◽  
Experimental Setup ◽  
Comprehensive Description ◽  
Quantitative Results ◽  
Shaft Torque

Full scale seakeeping trials are rare, especially planing hull and are in general focused in studying bottom pressures, accelerations and vibrations. In this paper, a comprehensive description of the experimental setup and analysis of full scale seakeeping trials propulsion data of a 65 ft planing pleasure yacht is presented. Torque and rpm have been measured on both propeller shafts during seakeeping trials in mild sea conditions, along with hull motions and accelerations. Correlations between hull motions and propulsion data are discussed, both in the time and frequency domain. Further tests on a shaft sample have been carried out in order to validate its mechanical properties and hence quantitative results regarding shaft torque. The main novelty of the present work lays in a detailed analysis of the propulsion system response of a planing pleasure yacht in mild weather conditions.

scholarly journals Experimental Setup for Swellable Elastomers in Cased and Open Holes

2021 ◽  
Author(s):  
Sayyad Zahid Qamar ◽  
Maaz Akhtar ◽  
Tasneem Pervez
Keyword(s):  
Full Scale ◽  
Experimental Setup ◽  
Well Bore ◽  
Test Setup ◽  
Testing Scheme ◽  
Open Hole ◽  
Actual Formation ◽  
The Way

A full scale experimental setup was designed and commissioned for testing of swelling elastomer seals against a casing (cased hole) and formation (open hole). Actual replicate of wellbore was designed with varying inside diameters and roughness to reproduce the effect of actual formation. The Dynaset packer mounted on a 7-inch tubular was allowed to swell against a 9–5/8-inch casing, while the fast swell packer mounted on a 9–5/8-inch tubular was allowed to swell against the 12–1/4-inch replicated well bore. This one-of-its-kind test setup can demonstrate the way the elastomers swell out and fill the asperities against smooth outer casing (cased hole) or against rough wellbore surface (open hole). Dismantling of the test setup midway through the testing scheme revealed a severely dimpled surface of the swelled elastomer.

Friction Forces Between Seabed and Fishing Gear Components

2012 ◽  
Author(s):  
Birger Enerhaug ◽  
Ana Ivanović ◽  
Finbarr O’Neill ◽  
Keith Summerbell
Keyword(s):  
Angle Of Attack ◽  
Full Scale ◽  
Contact Forces ◽  
Fishing Gear ◽  
Scaled Model ◽  
Friction Forces ◽  
Load Models ◽  
Scale Models ◽  
Energy Consuming ◽  
Scaled Models

Bottom trawls are still the most common, and most energy consuming type of fishing gear. For this type of fishing gear, as well as other types with bottom contact, the contact forces between gear elements and seabed have a significant influence on both resistance and shape. This paper describes the work that has been done in research programs at SINTEF in Norway and Marine Scotland Science in Scotland. In both studies sections of rock hoppers were examined, full scale sections and 1:5 scaled model sections were tested at sea and in laboratory, respectively. Scaled models at SINTEF were tested with the submerged models in water along with the additional tests in order to establish associated hydrodynamic forces. The tests were undertaken at angle of attack 0–90 degrees. Similar procedure was followed for full scale models giving a scope for potential comparison. The coefficients of friction for each model are presented as a function of penetration depth, towing speed and angle of attack, and the relevance as friction load models for fishing and off-shore gear are discussed.

Relation of Statistically Significant, Abnormal, and Typical WAIS-R VIQ-PIQ Discrepancies to Full Scale IQs

2000 ◽  
Vol 16 (2) ◽  
pp. 107-114 ◽  
Author(s):  
Louis M. Hsu ◽  
Judy Hayman ◽  
Judith Koch ◽  
Debbie Mandell
Keyword(s):  
Graphical Method ◽  
The United States ◽  
Full Scale ◽  
True Score ◽  
Absolute Value ◽  
Normative Population ◽  
The Us ◽  
The Mean ◽  
And Performance ◽  
Quadratic Models

Summary: In the United States' normative population for the WAIS-R, differences (Ds) between persons' verbal and performance IQs (VIQs and PIQs) tend to increase with an increase in full scale IQs (FSIQs). This suggests that norm-referenced interpretations of Ds should take FSIQs into account. Two new graphs are presented to facilitate this type of interpretation. One of these graphs estimates the mean of absolute values of D (called typical D) at each FSIQ level of the US normative population. The other graph estimates the absolute value of D that is exceeded only 5% of the time (called abnormal D) at each FSIQ level of this population. A graph for the identification of conventional “statistically significant Ds” (also called “reliable Ds”) is also presented. A reliable D is defined in the context of classical true score theory as an absolute D that is unlikely (p < .05) to be exceeded by a person whose true VIQ and PIQ are equal. As conventionally defined reliable Ds do not depend on the FSIQ. The graphs of typical and abnormal Ds are based on quadratic models of the relation of sizes of Ds to FSIQs. These models are generalizations of models described in Hsu (1996) . The new graphical method of identifying Abnormal Ds is compared to the conventional Payne-Jones method of identifying these Ds. Implications of the three juxtaposed graphs for the interpretation of VIQ-PIQ differences are discussed.

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