Erosive Burning Design Criteria Tech Article Summary on HPR Web Site

Erosive Burning Design Criteria Tech Article Summary on HPR Web Site

Post by CRogers.. » Fri, 06 May 2005 13:43:47



Gentlemen:

A summary of key technical results and conclusions from my High Power
Rocketry Magazine tech article "Erosive Burning Design Criteria for
High Power and Experimental/Amateur Solid Rocket Motors", which was
published in the January 2005 (Vol. 36, No. 1) issue of High Power
Rocketry, is now on the High Power Rocketry web site at:

www.hprmagazine.com/technical

A unique approach of using combined core Mach number/core mass flux
erosive burning design criteria is presented, design criteria which are
applicable whether the motor propellant is sensitive to velocity-based
or mass flux-based erosive burning.  The easy to implement design
criteria allow high power and experimental/amateur rocketeers to
determine the maximum length-to-diameter (L/D) ratio for a motor
design, or the minimum diameter for a motor core to maximize propellant
loading, for either non-erosive burning or max recommended erosive
burning.

An innovative constant core mass flux core design is also presented
that maximizes the L/D of a motor design, or minimizes the motor port
area (core cross-sectional area) for a given motor length.  Design
criteria for the constant core mass flux core design are presented for
both non-erosive and max recommended erosive burning.  Staggered or
tapered cores have been known to help reduce erosive burning in high
power and experimental/amateur solid rocket motors, but the constant
core mass flux core design minimizes the amount of core staggering and
adds some analytical rigor to what is often a "guestimate" on how
much to stagger the cores.

Chuck Rogers