Loading...
Please wait, while we are loading the content...
Further characterization of an active clearance control concept
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Oswald, Jay J. Steinetz, Bruce M. Taylor, Shawn C. |
| Copyright Year | 2007 |
| Description | A new test chamber and precision hydraulic actuation system were incorporated into an active clearance control (ACC) test rig at NASA Glenn Research Center. Using the improved system, a fast-acting, mechanically-actuated, ACC concept was evaluated at engine simulated temperatures and pressure differentials up to 1140 F and 120 psig, on the basis of secondary seal leakage and kinematic controllability. During testing, the ACC concept tracked a simulated flight clearance transient profile at 1140 F, 120 psig, with a maximum error of only 0.0012 in. Comparison of average dynamic leakage of the system with average static leakage did not show significant differences between the two operating conditions. Calculated effective clearance values for the rig were approximately 0.0002 in. at 120 psig, well below the industry specified effective clearance threshold of 0.001 in. |
| File Size | 1392267 |
| Page Count | 24 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080012570 |
| Archival Resource Key | ark:/13960/t4pk5c47k |
| Language | English |
| Publisher Date | 2007-12-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Leakage Actuators Blade Tips Seals Stoppers Test Chambers Gas Turbine Engines Kinematics Clearances Hydraulic Equipment High Temperature Active Control Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
