Accession Number : ADA533330


Title :   Epitrochoid Power-law Nozzle Concept for Reducing Launch Architecture Propulsion Costs


Descriptive Note : Technical paper


Corporate Author : AIR FORCE RESEARCH LAB EDWARDS AFB CA


Personal Author(s) : Paulson, Eric J ; Starkey, Ryan P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a533330.pdf


Report Date : 16 Nov 2010


Pagination or Media Count : 15


Abstract : A description is presented of a new and original 3-dimensional nozzle class incorporating modular thrust cells, the Epitrochoid Powerlaw (EP) Nozzle. A parametric design has been defined that uses epitrochoid planar curves for the nozzle cross-section in conjunction with a power law relationship between the primary radius and the nozzle's axial length, resulting in a radially lobed nozzle configuration. Attributes are described which potentially make the nozzle attractive from a cost and performance perspective in comparison to more conventional nozzle types. The current design approach is described here in detail. Ideal performance of the nozzle is defined. A design reference mission has been selected for nozzle optimization studies and is discussed. Potential research directions for future numerical and physical experiments are discussed.


Descriptors :   *LAUNCHING , *NOZZLES , *PROPULSION SYSTEMS , COSTS , THRUST , CROSS SECTIONS , RADIUS(MEASURE) , PARAMETRIC ANALYSIS , NUMERICAL METHODS AND PROCEDURES , ARCHITECTURE , MODULAR CONSTRUCTION , PHYSICAL PROPERTIES , LAW ENFORCEMENT


Subject Categories : Pumps, Filters, Pipes, Tubing, Fittings & Vlvs


Distribution Statement : APPROVED FOR PUBLIC RELEASE