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Friday, July 17, 2020 | History

1 edition of Preliminary results of a field experiment to characterize wind flow through a vertical plane. found in the catalog.

Preliminary results of a field experiment to characterize wind flow through a vertical plane.

Preliminary results of a field experiment to characterize wind flow through a vertical plane.

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Published by Pacific Northwest Laboratory .
Written in English


The Physical Object
Pagination35p. $0.00 C.1.
Number of Pages35
ID Numbers
Open LibraryOL17587487M

We explore preliminary results from initial field experiments, which were designed to directly compare the temperature measurements made from the UAS platform with measurements recorded by an in situ array while also considering the possibility of UAS platform-induced disturbances in the vertical thermal structure of the water column. We also. DUNEX is a multi-agency, academic and stakeholder collaborative community experiment to study nearshore processes during coastal storms. The multi-phase field experiment, taking place on the Outer Banks of North Carolina, began with a Fall pilot study, followed by the full experiment, with most activities taking place Fall through Winter

in the Langley V/STOL wind tunnel to determine the velocity field in the plume of a round jet in a cross flow. The first two experiments were studies of per- pendicular jet injection through a flat plate into a cross flow. Most of the apparatus and techniques utilized in . Flow Regimes: The combined effects of viscosity, channel slope, cross-sectional geometry and flow magnitude create a range of flow regimes in open channels. There are three different flow regimes (subcritical, supercritical, and mixed flow) where the relation between depth of flow and specific energy varies.

@article{osti_, title = {A preliminary assessment of the effects of groundwater flow on closed-loop ground source heat pump systems}, author = {Chiasson, A D and Rees, S J and Spitler, J D}, abstractNote = {A preliminary study has been made of the effects of groundwater flow on the heat transfer characteristics of vertical closed-loop heat exchangers and the . PDF Free Download Flatform - Start Research Documents. The reliable simple one-dimensional CPWTR model applied to the two-dimensional heat transfer problem of an insulated rectangular duct in an air conditioning or refrigeration system.


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Preliminary results of a field experiment to characterize wind flow through a vertical plane Download PDF EPUB FB2

Preliminary results are presented of a field experiment to study the turbulent structure in the wind flow through a simulated disc of rotation of a large, horizontal-axis wind turbine Cited by: 5.

An air curtain is often installed at a building entrance as an air barrier to reduce infiltration and resultant energy and air quality concerns.

Due t. An experimental field campaign is designed to unveil mechanisms responsible for turbulent exchange processes when mechanical and thermal effects are entwined. The focus is an urban street canyon with a mean aspect ratio H/W of in the business centre of a mid-size Italian city (H is the mean building height and W is the mean canyon width).

frictionless flow with no work or heat transfer. However, flow may or may not be irrotational. When flow is irrotational it reduces nicely using the potential function in place of the velocity vector. The potential function can be substituted into equation resulting in the unsteady Bernoulli Equation.

{1()2}0 2 pgz t!#$"+$"+$+!$= # ( From this simulation the flow field in the vertical plane through the rotor centre is obtained for each time step. In the aeroelastic HAWC2 simulations, the 3-D correction method by Snel et al. () is applied to the tabulated lift-coefficient polars, while the actuator line simulations have been run without 3-D corrections.

Figures 7a and 7b show horizontal wind vector fields at z = m, and Fig. 7c shows the wind vector field in a horizontal plane of z = m and in a vertical plane of y = m.

In Fig. 7a, the westerly flow toward the building elongated in the north–south direction (labeled 1 in Fig. 7a) at y = m diverges northward and southward in. This article reports the experimental and DNS database that has been generated, within the framework of the EU SESAME and MYRTE projects, for various.

Fulachier's 85 research works with citations and reads, including: Relaxation of turbulent boundary layer submitted to sudden distortion at the wall. The measurements included (i) acquisition of the radial velocity field in 12 measurement points over a vertical plane perpendicular to the ridges, (ii) the wind speed and direction along a virtual mast located in the valley, extending from the valley bottom up to m a.g.l., and (iii) the 80 m a.g.l.

wind speed and direction for 1 day ago  The evolution of the wind field during FFP indicated a strong fire-induced wind within the plume. There is a clear increase in both horizontal (u, v) wind components during the FFP, with the greatest increase from − to + m s −1 in the v -component indicating that strong fire-induced indrafts into the plume base from the cross-wise.

Figure 7 shows the axial velocity magnitude in the vertical plane aligned with the flow direction and placed in the middle of the farm.

The wind-turbine wakes are visible in figure 7 b (only five turbines are intersected by the γ =0 plane), together with the internal boundary layer above the farm and the wakes that tend to go downward.

Surface Conductances as Affected by Air Velocity, Temperature and Character of Surface by F.B. Rowley, A.B. Algren, and J.L. Blackshaw is the source for Fig. Their test plate was inserted (flush with interior) into a m by m opening cut from one vertical side of a m by m rectangular duct over 7 m long.

Volker Hannemann's 63 research works with citations and 3, reads, including: Investigation of Structured and Unstructured Grid Topology and Resolution Dependence for Scale-Resolving.

LAMINAR FLOW THEORY The following work only applies to Newtonian fluids. LAMINAR FLOW A stream line is an imaginary line with no flow norm al to it, only along it. When the flow is lam inar, the stream lines are parallel and for flow between two parallel surfaces we m ay consider the flow as m ade up of parallel lam inar lay ers.

Preliminary experiments with the temperature profile show that the IBL height relative to the cube height (H) was from to This height was lower than that for the large scale model, probably because the roughness of the small scale model was not large relative to the surroundings (paddy field or bare soil).

The purpose of this experiment is to learn how to use the wind tunnel to measure the difference between the stagnation (total) pressure and the static pressure at a specific point of a flow field and use that difference to compute the wind speed at that point using Bernoulli s equation.

Key equation The key equation is It gives engineers and scientists the greatest control over the flow of air, and produces the most efficient and precise results when models are tested.

The wind tunnel you will build is not a closed-circuit wind tunnel because this would be very expensive and difficult to make without sophisticated equipment and materials. When the wind tunnel was brought up to speed, the vane-type balance turned one way or the other, thereby indicating the relative lifting forces.

The preliminary results from the makeshift tunnel were so encouraging that the Wrights immediately built a larger and more sophisticated facility with a inch-square test section.

Here they obtained. DTU Wind Energy performed an atmospheric experiment at the Bolund peninsula during winter in order to make a test case for flow modelling in complex terrain (Bechmann et al. ; Berg et al. ).The two-month long intensive measurement campaign produced a unique dataset of sonic and cup anemometer measurements at various heights for selected locations.

At one end of the horizontal tube is a simple squeeze-pump which causes air to flow quickly through it. As a result, the pressure toward the top of the bottle is reduced, and the perfume flows upward along the vertical tube, drawn from the area of higher pressure at the bottom.

3. A liquid of dynam ic viscosity 5 x 10 -3 Ns/m 2 flows through a ca pillary of diam eter mm under a pressure gradient of N/ m 3. Evaluate the volum etric flow ra te, the m ean velocity, the cen tre line velocity and the radial position at which th e velocity is e qual to the m ean velocity.

u m/s d 32 µ u L û P 2 m m. A. Ideal flow model of flow past a circular cylinder In AOE you studied irrotational incompressible flow past a circular cylinder without circulation (see Bertin,section ).

Such a flow can be generated by adding a uniform flow, in the positive xdirection to a doublet at the origin directed in the negative xdirection. In transonic flight – at speeds of Mach or greater, but still less than Mach (aka. speed of sound) – wave drag is the result of local supersonic flow.