Lecture

Designing a 200 N Bi-Propellant Thruster: Key Considerations

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

In course

ENG-510: Space propulsion

The main objective of the course is to provide an overview about space propulsion systems like thermal propulsion systems, chemical propulsion systems and electrical propulsion systems. The secondary objective is to discuss all relevant equipment needed fo ...

Description

This lecture focuses on the design of a 200 N bi-propellant thruster, emphasizing the critical parameters and assumptions necessary for effective design. The instructor outlines the objective of designing a thruster within a 30-minute timeframe, detailing the performance specifications, including the use of HTP as an oxidizer and hypergolic pyridine as fuel. The lecture covers essential design elements such as main dimensions, mass flow rate, and optimal mixture ratios, while also discussing the implications of chamber pressure and nozzle area ratios. Various design methodologies are presented, including the implementation of a bell-shaped nozzle and considerations for combustion chamber length. The instructor provides insights into the cooling requirements and injection methods, specifically focusing on impingement techniques. Throughout the lecture, the importance of specific impulse and characteristic speed in thruster performance is highlighted, providing a comprehensive overview of the factors influencing thruster architecture and efficiency.

Official source

Related concepts (32)

Spacecraft propulsion

Spacecraft propulsion is any method used to accelerate spacecraft and artificial satellites. In-space propulsion exclusively deals with propulsion systems used in the vacuum of space and should not be confused with space launch or atmospheric entry. Several methods of pragmatic spacecraft propulsion have been developed, each having its own drawbacks and advantages. Most satellites have simple reliable chemical thrusters (often monopropellant rockets) or resistojet rockets for orbital station-keeping and some use momentum wheels for attitude control.

Propulsion

Propulsion is the generation of force by any combination of pushing or pulling to modify the translational motion of an object, which is typically a rigid body (or an articulated rigid body) but may also concern a fluid. The term is derived from two Latin words: pro, meaning before or forward; and pellere, meaning to drive. A propulsion system consists of a source of mechanical power, and a propulsor (means of converting this power into propulsive force).

Spacecraft electric propulsion

Spacecraft electric propulsion (or just electric propulsion) is a type of spacecraft propulsion technique that uses electrostatic or electromagnetic fields to accelerate mass to high speed and thus generate thrust to modify the velocity of a spacecraft in orbit. The propulsion system is controlled by power electronics. Electric thrusters typically use much less propellant than chemical rockets because they have a higher exhaust speed (operate at a higher specific impulse) than chemical rockets.

Laser propulsion

Laser propulsion is a form of beam-powered propulsion where the energy source is a remote (usually ground-based) laser system and separate from the reaction mass. This form of propulsion differs from a conventional chemical rocket where both energy and reaction mass come from the solid or liquid propellants carried on board the vehicle. The basic concepts underlying a photon-propelled "sail" propulsion system were developed by Eugene Sanger and the Hungarian physicist György Marx.

Beam-powered propulsion

Beam-powered propulsion, also known as directed energy propulsion, is a class of aircraft or spacecraft propulsion that uses energy beamed to the spacecraft from a remote power plant to provide energy. The beam is typically either a microwave or a laser beam and it is either pulsed or continuous. A continuous beam lends itself to thermal rockets, photonic thrusters and light sails, whereas a pulsed beam lends itself to ablative thrusters and pulse detonation engines.

Related lectures (64)

Chemical Propulsion Systems: An Overview

Covers the principles and applications of chemical propulsion systems in space missions.

Liquid Bi-propellant Propulsion Systems: Fundamentals and Architectures

Covers the fundamentals of liquid bi-propellant propulsion systems and their operational architectures.

Introduction to Space Propulsion Systems and Design

Introduces space propulsion systems, their design principles, and the importance of project management in aerospace engineering.

Spacecraft Propulsion MOOC: Space Mission Design and Operations

Explores spacecraft propulsion principles, including thrust, acceleration, efficiency, and chemical propulsion in space mission design.