scholarly journals Experimental Investigation of GTX100 Combustor Liner Cooling System

1998 ◽  
Author(s):  
Ulf E. Nilsson ◽  
Lars O. Lindqvist ◽  
Ingemar A. G. Eriksson ◽  
Jonas N. Hylén
Keyword(s):  
Experimental Investigation ◽  
Heat Load ◽  
High Performance ◽  
Cooling System ◽  
Flame Temperature ◽  
High Heat ◽  
Good Design ◽  
Annular Combustor ◽  
High Heat Load ◽  
Combustor Liner

The liner cooling for GTX100’s annular combustor has been successfully tested. Because of high heat load at the flame attachment point, a good design is very important. The design presented here offers robustness and high performance, combined with no dilution. The cooling system is a turbulated convective design, which were experimentally investigated in a plastic (perspex) model of a full scale 60° sector of the combustor. The importance of a high performance liner cooling is obvious. This design generates low pressure drop, better combustion (circumferential even flow from the liner cooling) and it gives lower flame temperature (minimizes the emissions). The influence of disturbances on the cooling and burner performance is presented in this paper.

scholarly journals Experimental Investigation of a Cooling System Entrance for an Annular Gas Turbine Combustion Chamber

1997 ◽  
Author(s):  
Lars O. Lindqvist ◽  
Ulf E. Nilsson ◽  
Jonas N. Hylén
Keyword(s):  
Experimental Investigation ◽  
Pressure Drop ◽  
Heat Load ◽  
High Performance ◽  
Cooling System ◽  
Flame Temperature ◽  
High Heat ◽  
Good Design ◽  
Annular Combustor ◽  
High Heat Load

A cooling entrance region for a modern annular combustor has been successfully tested. Because of high heat load at the entrance part of the liner, a good design is very important. The design presented here offers ultra-low dilution, robustness and high performance. The cooling system includes convective, film and impingement techniques, which were experimentally investigated in a plastic (perspex) model of a full scale 60° sector of a simplified combustor design. The importance of a high performance entrance is obvious. It generates low pressure drop, better combustion (circumferential even flow for the liner cooling) and it gives lower flame temperature (maximizes the air in the flame). Guidelines for the design of such an entrance are presented in this paper.

Air cooled loop thermosyphon cooling system for high heat load CPUs. Part II: experimental results and validation

2021 ◽  
pp. 1-1
Author(s):  
Guilherme S. R. B. Armas ◽  
Gautier Rouaze ◽  
Jackson B. Marcinichen ◽  
John R. Thome ◽  
L. Winston Zhang
Keyword(s):  
Heat Load ◽  
Cooling System ◽  
High Heat ◽  
Experimental Results ◽  
High Heat Load

Comparative Analysis of Different Data Center Airflow Management Configurations

2005 ◽  
Author(s):  
Saurabh Shrivastava ◽  
Bahgat Sammakia ◽  
Roger Schmidt ◽  
Madhusudan Iyengar
Keyword(s):  
Data Center ◽  
Heat Load ◽  
High Performance ◽  
Numerical Study ◽  
High Heat ◽  
Cooling Capacity ◽  
Key Issues ◽  
Specific Configuration ◽  
High Heat Load ◽  
Finite Volume Approach

Increase in computing power resulting from high performance microprocessors, packages, and modules and the deployment of high heat load computer rack units in high density configurations, has escalated the thermal challenges in today’s data center systems. One of the key issues is the location of hot recirculation regions in the room and the mixing of hot rack exhaust air with the cold supply air. Along with many factors such as the rack heat load and the cooling capacity of the supply air, the data center thermal management architecture plays an important role in determining the reliability of the electronic equipment and the general thermal performance of the data center. There are several candidate configurations available for the air ducting designs for data centers. The overall energy efficiency of the system is highly dependant upon the selection of the specific configuration. This paper will summarize the results of a broad numerical study carried out to assess the effectiveness of different data center configurations. The numerical modeling is performed using a commercial computational fluid dynamics (CFD) code based on finite volume approach. The configurations studied include different combinations of raised floor and ceiling supply and return vent location subject to specific constraints. The performance of the data center has been characterized on the basis of average and maximum mean region rack inlet air temperature. Among the seven different configurations compared, the raised floor/ceiling return type configuration is found to be the most effective configuration for the given set of constraints and assumptions.

Improved monochromator design for high heat load beamlines at CHESS (abstract)

1996 ◽  
Vol 67 (9) ◽  
pp. 3351-3351
Author(s):  
K.W. Smolenski ◽  
R. Pahl ◽  
P. Doing ◽  
C. Conolly ◽  
B. Clark ◽  
...  
Keyword(s):  
Heat Load ◽  
High Heat ◽  
High Heat Load

scholarly journals Simulated high heat load performance of an inclined crystal monochromator

1993 ◽  
Author(s):  
Albert T. Macrander ◽  
Ali M. Khounsary ◽  
Mark Graham
Keyword(s):  
Heat Load ◽  
High Heat ◽  
High Heat Load

Diamond channel-cut crystals for high-heat-load beam-multiplexing narrow-band X-ray monochromators

2021 ◽  
Vol 28 (6) ◽  
Author(s):  
Yuri Shvyd'ko ◽  
Sergey Terentyev ◽  
Vladimir Blank ◽  
Tomasz Kolodziej
Keyword(s):  
Heat Load ◽  
Narrow Band ◽  
Bragg Reflection ◽  
High Heat ◽  
High Repetition Rate ◽  
X Rays ◽  
Ray Optics ◽  
X Ray ◽  
Load Beam ◽  
High Heat Load

Next-generation high-brilliance X-ray photon sources call for new X-ray optics. Here we demonstrate the possibility of using monolithic diamond channel-cut crystals as high-heat-load beam-multiplexing narrow-band mechanically stable X-ray monochromators with high-power X-ray beams at cutting-edge high-repetition-rate X-ray free-electron laser (XFEL) facilities. The diamond channel-cut crystals fabricated and characterized in these studies are designed as two-bounce Bragg reflection monochromators directing 14.4 or 12.4 keV X-rays within a 15 meV bandwidth to 57Fe or 45Sc nuclear resonant scattering experiments, respectively. The crystal design allows out-of-band X-rays transmitted with minimal losses to alternative simultaneous experiments. Only ≲2% of the incident ∼100 W X-ray beam is absorbed in the 50 µm-thick first diamond crystal reflector, ensuring that the monochromator crystal is highly stable. Other X-ray optics applications of diamond channel-cut crystals are anticipated.

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