Related Experiment Video
Updated: Feb 7, 2026

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation
Published on: April 11, 2014
Vortex nozzle interaction in solid rocket motors: A scaling law for upstream acoustic response
L Hirschberg1, S J Hulshoff2, J Collinet1
1ArianeGroup, 51-61 Route de Verneuil, BP 3002, 78133 Les Mureaux Cedex, France.
Abstract:
In solid rocket motors, vortex nozzle interactions can be a source of large-amplitude pressure pulsations. Using a two-dimensional frictionless flow model, a scaling law is deduced, which describes the magnitude of a pressure pulsation as being proportional to the product of the dynamic pressure of the upstream main flow and of vortex circulation. The scaling law was found to be valid for both an integrated nozzle with surrounding cavity and a nozzle geometry without surrounding cavity that forms a right angle with the combustion chamber side wall. Deviations from the scaling law only occur when unrealistically strong circulations are considered.
More Related Videos
06:52Laboratory Scale Slow Cook-Off Testing of Rocket Propellants: The Combustion Rate Analysis of a Slowly Heated Propellant CRASH-P Test
Published on: February 6, 2021
07:58Improving the Combustion Performance of a Hybrid Rocket Engine using a Novel Fuel Grain with a Nested Helical Structure
Published on: January 18, 2021
Related Concept Videos
Third Law of Thermodynamics
Second Law of Thermodynamics
Rocket Propulsion in Gravitational Field - II
A rocket's acceleration depends on three major factors, consistent with the...
Molecular and Ionic Solids
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
Structures of Solids