Rocket Motor Simulator

INTRODUCTION

This is HSIM 1.0. Based on HSIM 0.4

This simulator works on two basic types of rocket motors.

First, nitrous hybrid:

In nitrous hybrid mode the models assume the tank is a cylinder and that the any solid fuel grain is a cylinder (i.e. has a single port). The assumption of self-pressurized nitrous is pretty baked into the model, but the other simplifying assumptions are lightly used and could probably be changed without much difficulty.

Second, nitrous hybrid liquid biprop:

In liquid mode the models assume a blow-down pressurized motor, with self-pressurized nitrous and compressed nitrogen pressurized liquid fuel.

This pre-release version of the simulator is intended for use by people who have substantial knowledge of small hybrid or liquid motor design.

AS-IS USAGE

This simulator has been somewhat tested and appears to give reasonable results over a useful range of inputs. However, the authors make no warranty of correctness or even reasonableness.

VERSION HISTORY

0.1 July 1, 2006 First Release 0.2 September, 2006 - Fix bug: injector count input now works - Reports injector pressure drop ratio - Reports motor class designation - Calculates the amount of nitrous vented to chill flight tank 0.3 May 30, 2007 - Web version.

0.4 July, 2014 - Added liquid fuels

1.0 August, 2015 - Pushed to github.com

Note: the program "report" makes some sense of the output file.