lecture13 - ECE2984 Lecture13:ROCKETSANDPROPULSION...

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ECE 2984 Lecture 13: ROCKETS AND PROPULSION Joseph Baker (ECE Dept) Lecture 13: Rockets and Propulsion ECE 2984: Exploration of Space
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Short Note from Dr. Baker ologize r ot eing ass day ave e harlotte I apologize for not being in class today. I have to be in Charlotte WV for an appointment to renew my Green Card. If all goes well, you will see me back in class after the break! Today’s lecture will be given by Dr. Ruohoniemi who is an expert on space science and rockets! (You should stay after class and ask him about the Super Dual Auroral Radar Network). p ) There will be no homework over the break but I will be sending out information about the course project to get you thinking about it. At this time, I ask you to please close your laptops and give Dr. Ruohoniemi your full attention while he delivers this lecture. nally ope u l ave n njoyable reak! Joseph Baker (ECE Dept) Lecture 13: Rockets and Propulsion ECE 2984: Exploration of Space Finally, I hope you all have an enjoyable break!
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Last Lecture LAST LECTURE: Orbital Ground Tracks Orbital Maneuvers: (1) Hohmann Transfer (2) Coplanar Rendezvous (3) Orbit Plane Changes THIS LECTURE: Rockets: Thrust and Specific Impulse The Rocket Equation Types of Rockets Joseph Baker (ECE Dept) Lecture 13: Rockets and Propulsion ECE 2984: Exploration of Space
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Basic Rocket Science Joseph Baker (ECE Dept) Lecture 13: Rockets and Propulsion ECE 2984: Exploration of Space
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Space Mission Rockets Rockets are used in a space mission as propulsion systems for the following purposes: Get the spacecraft into space (i.e. launch) Perform orbital maneuvers (e.g. Hohmann transfer) hange ointing irection Change pointing direction (i.e. attitude control) Joseph Baker (ECE Dept) Lecture 13: Rockets and Propulsion ECE 2984: Exploration of Space
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What is a Rocket? A rocket is an engine that takes ass lus nergy d nverts mass plus energy and converts them into a force called “thrust that moves a vehicle forward. y ifference etween A key difference between a rocket and a jet engine is a rocket is fully self contained, whereas a jet engine requires air. j g q The mass the rocket uses to produce thrust is called the “propellant” . The basic function of the rocket is to convert potential energy stored inside the propellant into Joseph Baker (ECE Dept) Lecture 13: Rockets and Propulsion ECE 2984: Exploration of Space kinetic energy of motion.
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Rocket Thrust: Newton 3 A rocket uses Newton’s Third Law (“action/reaction”) t op roduce a force called thrust that propels the rocket. A mass of exhaust gas is ejected at igh eed ne irection high speed in one direction Newton’s third law pushes the rocket in the other direction.
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This note was uploaded on 09/19/2011 for the course ENGE 1114 taught by Professor Twknott during the Fall '06 term at Virginia Tech.

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lecture13 - ECE2984 Lecture13:ROCKETSANDPROPULSION...

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