SCIENTIFIC AND TECHNICAL AEROSPACE REPORTS

A Biweekly Publication of the National Aeronautics and Space Administration
VOLUME 44, ISSUE 14 - JULY 18, 2006

07 AIRCRAFT PROPULSION AND POWER
Includes primary propulsion systems and related systems and components, e.g., gas turbine engines, compressors, and fuel systems; and onboard auxiliary power plants for aircraft.

For related information see also 20 Spacecraft Propulsion and Power; 28 Propellants and Fuels; and 44 Energy Production and Conversion.

20060019482 Boeing Co., Canoga Park, CA USA

Overview of the State-of-the-Practice in Liquid Propellant Rocket Engine Design, Analysis, and Test

Sindir, Munir M; Jun 21, 2004; 46 pp.; In English; Original contains color illustrations Report No.(s): AD-A446391; No Copyright; ONLINE: http://hdl.handle.net/100.2/ADA446391; Avail.: CASI: A03, Hardcopy

This conference paper covers the agenda as follows: 1) Overview of the Space Transportation Market, Current Space Vehicles and Propulsion Systems; 2) Challenges in Liquid-Propellant Rocket Engine Development and Future Direction; 3) Video on the Current State-of-the-Practice in Rocket Engine Turbine Blade Design and Analysis; 4) Key Rocket Engine Components, Examples of Current Engineering Practices, Technology Needs for the Future; and, 5) Conclusions and some thoughts on University, Government and Industry collaboration. DTIC

Design Analysis; Energy Conversion; Liquid Propellant Rocket Engines; Rocket Engine Design; Rocket Engines

20060020785 Mechanical Technology, Inc., Latham, NY, USA

Numerical, Analytical, Experimental Study of Fluid Dynamic Forces in Seals, Volume 5, Description of Seal Dynamics Code DYSEAL and Labyrinth Seals Code KTK

Shapiro, Wilbur; Chupp, Raymond; Holle, Glenn; Scott, Thomas; October 2004; 127 pp.; In English; Original contains black and white illustrations Contract(s)/Grant(s): NAS3-25644; WBS 22-00-00 Report No.(s): NASA/CR-2004-213199/VOL5; E-14708-5/VOL5; No Copyright; Avail.: CASI: A07, Hardcopy

The objectives of the program were to develop computational fluid dynamics (CFD) codes and simpler industrial codes for analyzing and designing advanced seals for air-breathing and space propulsion engines. The CFD code SCISEAL is capable of producing full three-dimensional flow field information for a variety of cylindrical configurations. An implicit multidomain capability allow the division of complex flow domains to allow optimum use of computational cells. SCISEAL also has the unique capability to produce cross-coupled stiffness and damping coefficients for rotordynamic computations. The industrial codes consist of a series of separate stand-alone modules designed for expeditious parametric analyses and optimization of a wide variety of cylindrical and face seals. Coupled through a Knowledge-Based System (KBS) that provides a user-friendly Graphical User Interface (GUI), the industrial codes are PC based using an OS/2 operating system. These codes were designed to treat film seals where a clearance exists between the rotating and stationary components. Leakage is inhibited by surface roughness, small but stiff clearance films, and viscous pumping devices. The codes have demonstrated to be a valuable resource for seal development of future air-breathing and space propulsion engines Author

Computational Fluid Dynamics; Labyrinth Seals; Three Dimensional Flow; Rotor Dynamics; Flow Distribution

Source: NASA