Getting your Trinity Audio player ready...

<!– STARTER CSS
WRAP it all in a

background page color is #FBFCFC
–>

div#content.article .graphic-wrapper h2,
.graphic-wrapper img {max-width:100%}
a.credit{font-style:italic}
.graphic-wrapper p{font-weight:normal;}

/* Put a

on your charts*/
.graphic-wrapper .legend p{font-family:’Arial’, sans-serif; font-size:14px; color:#000;}
ul.key li{display: inline;margin-right: 28px;font-family: ‘Arial’,sans-serif;color: #000;font-size: 13px;}

/* A will draw a colored box for use in a color key. You will need to write a second class to set the color so it matches the chart/map/etc. */
.box{display: inline-block;background-color: #000;height: 10px;width: 10px;margin: 0 5px 0 0px;}

.clearfix{clear:both}

/* REMOVE HEIGHT and WIDTH attributes from fusion tables and replace with class=’fusion-table’ */
.fusion-table{width:100%;height:400px;}

/* USE AN

in “.graphic-wrapper” for chart labels */
.graphic-wrapper h4{color:#000;font-family:’Arial’, sans-serif;font-weight:bold;font-size:16px}

/* USE AN inside the

More Top Picks Best Smart Plug

for normal-weight italic type */
.graphic-wrapper h4 em{font-weight:normal;}

/* TABLE STYLES — just be sure

is in “.graphic-wrapper” */
.graphic-wrapper table thead tr {background-color:#12182d;color:#fff;}
.graphic-wrapper table td,.graphic-wrapper table th{font-size:14px; font-family:’Arial’, sans-serif;}
.graphic-wrapper table td {padding:7px;}
.graphic-wrapper table th {padding:10px 7px;}
.graphic-wrapper table tr:last-child{ border-bottom: 2px solid #12182d;}
.graphic-wrapper table tr:last-child td{ padding-top: 10px; padding-bottom:10px;}

/* TABLE ZEBRA STRIPES — use

*/
.graphic-wrapper table.zebra td {padding:10px 7px;}
.graphic-wrapper table.zebra tr:nth-child(even) {background: #d3deea}

.show-phone{display:none;}

/* YOUR NEW STYLES HERE */

@media all and (max-width: 700px) {

.show-phone{display:initial;}
.hide-phone{display:none;}

/* THIS IS WHERE PHONE-SPECIFIC STYLES GO */

}

In an effort to curb noise pollution and design quieter jet engines, engineers at Argonne National Laboratory in Lemont are working with engine manufacturer General Electric, using high-performance computers to study how engines make noise.

Building and testing physical prototypes of jet engines takes time and money. Powerful networks of computers are used to create 3-D models that accurately replicate the performance of new engine designs. The computer uses simulation technology and applies it to the new designs — creating a virtual wind tunnel. The simulations that used to take months to generate are now done in two to three weeks.

‘

About the Mira supercomputer at Argonne

  • Platform: IBM Blue Gene/Q system
  • Peak computing speed: 10 petaflops (10 quadrillion calculations per second)
  • Size: 786,432 processors (cores), contained within 49,152 computers and other devices, set into 96 racks. The system gives off so much heat it needs to be water-cooled with copper tubes alongside the chips.

Redesigning engine exhaust nozzles

General Electric has redesigned and outfitted the exhaust nozzles of engines. Noise is created by pressure fluctuations in the air. Swirling air, called vortices, cause the pressure to fluctuate.

Vortices emitted from a traditional cone-shaped nozzle create one big smooth circle that makes a specific amount of noise.


The chevron nozzle breaks up the vortices into smaller parts that dissipate faster. This mixing action reduces the conditions that make noise.


How the new engines could affect noise near runways:


Mira model of the noise coming from the back of a jet engine:

More Top Picks Best Japanese Chef Knives Under 200 Dollars

SOURCES: Argonne National Laboratory, General Electric

Images courtesy Argonne National Laboratory and General Electric

@ChiTribGraphics

Filed underNewsReviewsAll Categories

More Stories