Development of One-Dimensional Analytical Model for a SparkJet Actuator

This study develops 1-D analytical model of a SparkJet actuator, called the filtered line model (FLM). The FLM is based on spatially integrating the conservation equations within a geometry of the SparkJet actuator. The mass, momentum, and energy fluxes transported between the cavity and orifice are...

Full description

Saved in:
Bibliographic Details
Published in:AIAA journal 2021-03, Vol.59 (3), p.1055-1074
Main Authors: Shin, Jin Young, Kim, Hyung-Jin, Kim, Kyu Hong
Format: Article
Language:English
Subjects:
Actuators
Angles (geometry)
Computational fluid dynamics
Conservation equations
Dimensional analysis
Enthalpy
Fluxes
Mathematical models
Orifices
Tapering
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study develops 1-D analytical model of a SparkJet actuator, called the filtered line model (FLM). The FLM is based on spatially integrating the conservation equations within a geometry of the SparkJet actuator. The mass, momentum, and energy fluxes transported between the cavity and orifice are derived analytically by assuming an isentropic relation and total enthalpy conservation inside the SparkJet actuator. To validate these physical assumptions, six different computational fluid dynamics (CFD) analysis cases are considered under various energy conditions and taper angles. After validating the assumptions, the accuracy of the FLM is highly secured when compared to CFD. The flow variables (such as the orifice velocity) and performance variables (such as thrust and impulse) are presented as the result of the FLM, which agree well with the result of the CFD analysis. With respect to the impulse, which is regarded as a key parameter of SparkJet actuators, less than approximately 0.1 and 0.51% errors occurred under various energy conditions and taper angles, respectively.
ISSN:0001-1452
1533-385X
DOI:10.2514/1.J059619