Optimum spacing of shell frames

1964 ◽  
Vol 1 (4) ◽  
pp. 219-220 ◽  
Author(s):  
B. SAELMAN
Keyword(s):  
Optimum Spacing

scholarly journals Optimum spacing between grooved tubes: An experimental study

2020 ◽  
Vol 34 (1) ◽  
pp. 469-475
Author(s):  
Asif Afzal ◽  
A. D Mohammed Samee ◽  
R. K Abdul Razak ◽  
Sher Afghan Khan ◽  
Hurmathulla Khan
Keyword(s):  
Experimental Study ◽  
Optimum Spacing

Modeling of Flow Acceleration Around Wind Farms

2007 ◽  
Author(s):  
Patrick Moriarty ◽  
Tetsuya Kogaki
Keyword(s):  
Wind Farm ◽  
Computational Models ◽  
Three Dimensional ◽  
Wind Farms ◽  
Navier Stokes ◽  
Local Wind ◽  
Flow Acceleration ◽  
Wind Speeds ◽  
Optimum Spacing ◽  
Future Work

Recent measurements from operating wind farms demonstrate that the layout of the farm and interactions between turbine wakes strongly affects the overall efficiency of the wind farm. In some wind farms arranged in rectangular layouts, winds coming from the direction of the rectangular corner create a potential acceleration around the wind farm. This acceleration inherently leads to stronger local wind speeds at wind turbines downstream of the corner turbine, thereby increasing the power output of the downstream turbines. In this study, computational models are developed to predict this complex behavior seen in wind farms. The model used to examine these effects is a fully three-dimensional unsteady incompressible Navier-Stokes code, with the turbulence model turned off. Preliminary results show an optimum spacing configuration is possible. However, the results have yet to be verified at higher Reynolds number, which will be the effort of future work. Ultimately, these tools may lead to more optimal wind farm layouts.

scholarly journals Thermally Optimum Spacing between Inner Plates in Natural Convection Flows in Cavities by Numerical Investigation

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 554 ◽  
Author(s):  
Blas Zamora
Keyword(s):  
Natural Convection ◽  
Aspect Ratio ◽  
Numerical Investigation ◽  
Thermophysical Properties ◽  
Electronic Equipment ◽  
Passive Devices ◽  
Wide Range ◽  
Optimum Spacing ◽  
Rayleigh Numbers ◽  
Wall Spacing

Buoyancy-driven airflow that included two isothermal inner plates established in a vented cavity is investigated numerically. The thermally optimum wall-to-wall spacing of the immersed channel, as well as its dependence with respect to the relevant governing parameters, are determined. Results are presented as a function of the aspect ratio b/H for a wide range of Rayleigh numbers RaH. A logarithmic correlation for the optimum (b/H)opt as a function of RaH is presented. In addition, since the outlined configuration might be subject to intense heating conditions, the influence of considering variable thermophysical properties is also included in the analysis. In fact, an appreciable influence of the variation of properties on (b/H)opt is also detected for a representative value of RaH = 109. Obtained results can be directly applied to the optimization of electronic equipment cooling, or even to thermal passive devices in buildings.

Performance of Intercrops under Different Spacings of Jatropha curcas Plantations in Tamil Nadu, India

2020 ◽  
Author(s):  
V. Subbulakshmi ◽  
K. Srinivasan ◽  
M. P. Divya ◽  
S. Mani ◽  
S. Kala ◽  
...  
Keyword(s):  
Jatropha Curcas ◽  
Energy Demand ◽  
Tamil Nadu ◽  
Agroforestry System ◽  
Agroforestry Systems ◽  
Growth And Yield ◽  
Oilseed Crops ◽  
Optimum Spacing ◽  
Design Result ◽  
Plot Design

Background: Non-edible oil as biodiesel helps to meet the energy demand and to reduce environmental degradation. Jatropha curcas is one of the potential oil yielding plant which can be grown under agroforestry systems without affecting food production. Hence the current study aimed to find out compatible intercrop under J. curcas and optimum spacing of J. curcas for intercropping. Methods: A study was carried out in three and a half-year old J. curcas plantation. Different spacings of J. curcas viz., 3m × 3m, 4m × 2m and 4m × 3m and different legumes viz., blackgram, greengram, cowpea, groundnut and oilseed crops viz., gingelly and sunflower were evaluated in split plot design. Result: Growth and yield of intercrops, available soil N, P and uptake of N, P, K by intercrops were significantly higher at wider spacing of J. curcas (4m × 3m). Among the intercrops, groundnut recorded higher uptake of N (67.3 kg ha-1), P (19.9 kg ha-1) and K (65.3 kg ha-1). Groundnut produced a significantly higher yield (885 kg ha-1) followed by cowpea (630 kg ha-1). The study found that planting of J. curcas at 4m × 3m spacing and intercropping with groundnut is a compatible and profitable J. curcas based agroforestry system.

An optimum spacing problem for five chips on a horizontal substrate in a vertically insulated enclosure

1999 ◽  
Vol 24 (4) ◽  
pp. 310-318 ◽  
Author(s):  
Y. Liu ◽  
N. Phan-Thien ◽  
C. W. Leung ◽  
T. L. Chan
Keyword(s):  
Optimum Spacing ◽  
Spacing Problem ◽  
Horizontal Substrate

Impingement Cooling of Concave Surfaces With Lines of Circular Air Jets

1969 ◽  
Vol 91 (3) ◽  
pp. 149-155 ◽  
Author(s):  
D. E. Metzger ◽  
T. Yamashita ◽  
C. W. Jenkins
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Surface ◽  
Important Class ◽  
Two Dimensional ◽  
Heat Transfer Characteristics ◽  
Impingement Cooling ◽  
Air Jets ◽  
Optimum Spacing ◽  
Circular Jets ◽  
Jet Nozzle

An experimental study of the heat transfer characteristics between single lines of circular jets and concave cylindrical surfaces is presented. It is intended to model a practically important class of impingement cooling configurations for which existing heat transfer correlations are not obviously applicable. The results clarify the present uncertain position with regard to the optimum spacing between the jet nozzle and the heat transfer surface and with regard to the center-to-center spacing between the jets. Some limited results for a two-dimensional jet impinging on the concave surfaces are also presented.

Sign in / Sign up

Export Citation Format

Share Document