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The use of heavy gas for increased reynolds numbers in transonic wind tunnels
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Murthy, A. V. Anders, J. B. Anderson, W. K. |
| Copyright Year | 1998 |
| Description | The use of a high molecular weight test gas to increase the Reynolds number range of transonic wind tunnels is explored. Modifications to a small transonic wind tunnel are described and the real gas properties of the example heavy gas (sulfur hexafluoride) are discussed. Sulfur hexafluoride is shown to increase the test Reynolds number by a factor of more than 2 over air at the same Mach number. Experimental and computational pressure distributions on an advanced supercritical airfoil configuration at Mach 0.7 in both sulfur hexafluoride and nitrogen are presented. Transonic similarity theory is shown to be partially successful in transforming the heavy gas results to equivalent nitrogen (air) results, provided the correct definition of gamma is used. |
| File Size | 1448751 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040090510 |
| Archival Resource Key | ark:/13960/t8sb9188v |
| Language | English |
| Publisher Date | 1998-01-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Thermodynamics Navier-stokes Equation Test Facilities Sulfur Hexafluoride Reynolds Number Unstructured Grids Mathematics Transonic Wind Tunnels Cryogenics Real Gases Pressure Distribution Airfoils Nitrogen Mach Number Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
