Full text of solid rocket motor design and testing see other formats solid propellant rocket motor design and testing a thesis presented to the department of mechenicsl enslineer insi the faculty of endineerinsi the university of manitoba in partial fulfillment of the reouirements for the decree bachelor of science in mechanical enaineerina by richard allan nakka april 1984 abstract this. Solidrocketmotor performancematching design framework article pdf available in journal of spacecraft and rockets 543. This fee supports the authors efforts and promotes the continued development of burnsim. A solid rocket motor is a rocket motor that uses a solid mixture of chemicals as its propellant. The process of developing the motor performance estimate and the system level model of a space propulsion solid rocket motor is described in detail. The space shuttle solid rocket booster space shuttle srb was the first solidpropellant rocket to be used for primary propulsion on a vehicle used for human spaceflight and provided the majority of the space shuttles thrust during the first two minutes of flight.
The techniques reflect actual spaceflight operations experience and related field experience that can be used to achieve continuous improvement. Both propellant and nozzle are crucial for design and construction of rocket motor. Solid rocket motor for experimental sounding rockets. The system level aspect of this preliminary design process, and the ability to synthesize space propulsion solid rocket motor requirements into a near optimal design, is achievable.
There are many designs that can be used to produce specified motor performance characteristics and the. Motor designs in burnsim can be saved and recalled for later use. Although the thrust vector control mechanism is also a component of many rocket. The main objective of rocket design is to reduce glow and increase the payload ratio for a speci c mission. Design optimization of solid rocket motor grains for. Richard nakkas experimental rocketry web site solid rocket motor theory propellant grain propellant grain the propellant utilized in amateur experimental rocket motors may be simple in composition, being comprised of two main constituents fuel and an oxidizer. Preliminary design provided key propulsion outputs that would later be refined and assessed in the final design. Burnsim allows you to make notes about your propellants and motor designs, all saved in. This dynamic balance is defined by using a linear variation known as st. Solid rocket components and motor design this is the last of four chapters on solid propellant rockets. Conceptual design and structural analysis of solid rocket. The twentyseventh space congress nsts and derivatives april 2427, 1990. The program aids in unifying the nozzle, chamber and injector portions of a rocket propulsion system design effort quickly and efficiently using a streamlined graphical user interface gui. Initial geometry is defined in the form of a surface which defines the grain configuration.
Roberts law between the rate at which the propellant surface recedes r and the chamber. Q motor case design is governed by the motor and vehicle requirements, such as performance characteristics including motor propellant grain design, envelope constraints, mission profile, and other components within. Spacecad is a rocket design and simulation software that can be used to design and simulate the flight of model rockets. After burnout, they were jettisoned and parachuted into the atlantic ocean where they were recovered, examined, refurbished, and. General techniques to calculate solid rocket motor performance characteristics to determine if certain designs are feasible or to obtain more realistic. The tools used at this level must be simple and friendly enough to be operated by propellant grain project managers themselves. Variations of solid rocket motor preliminary design for. Variations of solid rocket motor preliminary design. Design, analysis, and simulation of rocket propulsion system. In 1980, sforzini 1 commented in his own solid rocket optimization paper that despite the tractable mathematics involved in designing a solid rocket motor, limited treatment of this subject appears in the literature. The adminis trator has appointed general sam phillips. Paper session iiia the advanced solid rocket motor project.
A system level model for preliminary design of a space. Sfmea software failure modes and effects analysis sfta software fault tree analysis srm solid rocket motor sspp system safety program plan. Motor firing from september 2016 rocket motor design class at cp technologies taught by john wickman. In addition, test data can be imported and graphed alongside simulation data to compare sims to results. Oltclnatar document title preliminary solid rocket motor design techniques. Finding the optimal design of a solid rocket motor to meet certain criteria has been subject of search since the 1960s. This document details the functionality of a software program used to streamline a rocket propulsion system design, analysis and simulation effort.
A structural analysis is performed to verify the structural integrity of the solid rocket motor at certain working temperature. I was wondering if there are any software available for rocket design or nozzle design. Grains with circular perforated stars, wagon wheels, and dog bones can be considered and multiple tapered sections. Machining of solid propellant surfaces is generally done by large cutting machines specially modified to accommodate the safety hazards associated with solid propellants. We describe the key inert components of solid propellant rocket motors, namely the motor case, nozzle, and igniter case, and then discuss the design of motors. The performance prediction of the solid rocket motor can be achieved easily if the burn back steps of the grain are known. When performing a solid propellant grain design analysis, two levels of design accuracy have to be distinguished. This preliminary design study serves to provide an in depth comparison of liquid, solid, and hybrid propulsion concepts for a longterm insitu mars ascent vehicle imav which relies only on propellants which can be harvested from the mars atmosphere or soil. Guide to reusable launch and reentry vehicle software and. The solid motor code models tapered motor geometries using analytical burn back methods by slicing the grain into thin sections along the axial direction. This article is from design methods in solid rocket motors. Includes some useful additional features not currently implemented in srm. Spp includes additional 3d grain design and 1d motor ballistics modules. A particle swarmpattern search hybrid optimizer was used to drive a solid rocket motor modeling code to an optimal solution.
Design optimization of solid rocket motor grains for internal ballistic performance by r. Student static firing his solid rocket motor that he designed and built in the cp technologies solid rocket motor design class. Abstract rocket motors are widely used to generate thrust or impulsive force to impart a desired velocity to flight vehicle to transport its payload to the intended destination. The spp12 nozzle module analyzes and summarizes the performance loss mechanisms into four categories. A freetouse online application, meteor is a convenient, validated tool for designing rocket motors. Many of these types of machines are built specifically for a particular rocket motor. Rocket motor is a highly complex aerospace component that consists of a metal casting, ablative liner and propellant grain. The software has now become an integrated part of the design process of a solid propellant rocket.
This section provides a rich source of ideas to any organization that is involved in either spaceflight operations or design to support those operations. Solid rocket motor design using hybrid optimization. Also to determine the design pressure and burst pressure of a solid rocket casing. Had my first runin with a defective rocket motor while launching a small raspberry pi sensor package. Computational simulation and design applications for research and development in the field of chemical rocket propulsion and combustion. Pdf solid rocket motor design using hybrid optimization. Design and geometrical analysis of propellant grain. Modelling and verification of solid propellant rocket. In this paper, design and optimization technique of slotted tube grain for solid rocket motors has been discussed. The design process involves parametric modeling of the geometry in catia software through dynamic variables that define the complex configuration. Pdf preliminary design and optimization of slotted tube. In this study, grain burn back analysis for 3d star grain geometries for solid rocket motor was investigated. Design and structural analysis of solid rocket motor casing hardware used in aerospace applications b. Preliminary solid rocket motor design techniques h.
Software for preliminary design of solid propellant rocket. Nozzle is the part of motor responsible for thrust generation and experiences high amount of temperature and pressure changes. The design process involves parametric modeling of the. It is my guess that these software are used by big rocket companies and are not available for the general population. The solid motor code models tapered motor geometries using analytical. The solid performance program, spp12 is the latest version of the jannaf standard for performance predictions of solid propellant rocket motors srms. The license entitles one person to install, activate up to 5 times and use burnsim. It is a gui driven software which a designer can use to produce preliminary design for solid propellant rockets. The customer was provided with the customized software. General techniques to calculate solid rocket motor perforniance characteristics to determine if certain designs are feasible or to obtain more realistic preliminary design data are described in this report. In doing so, the design objectives and constraints have been set, geometric.
Design and structural analysis of solid rocket motor. Solidrocketmotor performancematching design framework. In a nutshell, input your motor, nozzle and propellant characteristics and burnsim calculates the kn kilonewton through the burn and predicts estimated chamber pressure and. The propellant is ammonium nitrate, magnesium powder and r20lm htpb.
A comparison of preliminary design concepts for liquid. Rpa is a multiplatform analysis tool for conceptual and preliminary design of chemical rocket engines capable of. These softwares are used for making model rockets, model rocket design and analysis, 3d rocket design, rocket motor calculation and designing and for rocket thrust, cg and cp calculations. Aeroisp is a solid rocket motor srm internal ballistics computer program that assumes the rate of combustion of the burning gases are in dynamic equilibrium with the rate at which the exhaust gases are expelled out the nozzle. Southwest missouri state university, 1998 a thesis submitted in partial fulfillment of the requirements for the degree of master of science in the department of mechanical, materials, and aerospace engineering. Solid propellant rocket motor performance prediction. Space launcher systems analysis sart, dlr, bremen, germany. The number of installsactivations is flexible, you wont be forced to purchase a new license if you reinstall windows 5 times over a period of time and have. Oocuptnt ttpc j gen rpt q nonstd part q spec nvirchmcnyal exfolurf cooii na io.