Techsburg was honored to be selected as one of 24 small businesses across the country to receive a Northrop Grumman World Class Team Supplier Award. The awards were presented December 3, 2014 at a Northrop Grumman luncheon in Springfield, Virginia, and Techsburg chairman Dr. Wing Ng was on hand to gratefully receive the award. Techsburg is currently supporting Northrop Grumman with analysis and testing for a variety of platforms.
Techsburg and Solar Turbines co-author a paper entitled “The Experimental Studies of Improving the Aerodynamic Performance of a Turbine Exhaust System”, presented at the ASME Turbo Expo 2014 in Dusseldorf, Germany
Analysis and testing was conducted to optimize an axial diffuser-collector gas turbine exhaust. Two subsonic wind tunnel facilities were designed and built to support this program. A 1/12th scale test rig enabled rapid and efficient evaluation of multiple geometries. This test facility was designed to run continuously at an inlet Mach number of 0.41 and an inlet hydraulic diameter-based Reynolds number of 3.4 x 105. A 1/4th geometric scale test rig was designed and built to validate the data in the 1/12th scale rig. This blow-down rig facilitated testing at a nominally equivalent inlet Mach number, while the Reynolds number was matched to realistic engine conditions via back pressure. Multi-hole pneumatic pressure probes, particle image velocimetry and surface oil flow visualization was deployed in conjunction with computational tools to explore physics based alterations to the exhaust geometry. The design modifications resulted in a substantial increase in the overall pressure recovery coefficient of +0.07 (experimental result) above the baseline geometry. The optimized performance, first measured at 1/12th scale and obtained using CFD was validated at the full scale Reynolds number.
Accepted for ASME J of Engineering for Gas Turbines & Power.
Wing Ng, Techsburg Chairman and the Christopher C. Kraft Endowed Professor in Engineering at Virginia Tech, has received the university’s 2014 William E. Wine Award.
Techsburg has been selected as one of Aviation Week’s “Companies to Watch” at the Aerospace & Defense Conference in Phoenix, AZ.
Techsburg chairman Dr. Wing Ng presents a paper entitled “Development of an Air Data System for Ducted Fan Unmanned Aircraft” at the 50th AIAA Aerospace Sciences Meeting, Nashville, TN
Development of an Air Data System for Ducted Fan Unmanned Aircraft
Analysis and wind tunnel testing performed as part of a development program for a family of ducted fan unmanned aircraft has generated a significant database of wind tunnel data. These include force and moment data as well as duct lip surface pressures over a range of flight velocities, fan speeds, and vehicle tilt angles. In recognition of the need for a simple, lightweight, and robust air data system for this class of UAV, a study was undertaken to correlate duct pressure data to freestream flow velocities. Sample pressure data and a simple correlation methodology is presented in this paper. Results from this study indicate a strong correlation is present between duct pressures and freestream flow velocities, with very good system sensitivities at flow speeds at and well below 5 knots for the vehicles studied.
Click the link above to read the article.