Modeling of the spray-induced wall stress acting on the ignition assistance device

Sayop Kim, Roberto Torelli, Surya Kaundinya Oruganti, Je Ir Ryu, Tonghun Lee, Kenneth S. Kim, Chol Bum M. Kweon

Research output: Contribution to journalArticlepeer-review


This research introduces a novel wall-stress model called the Spray-Induced Wall Stress (SIWS) model, which considers the effects of spray-wall impingement and the resulting formation of wall stress within the Lagrangian spray modeling framework. The primary objective of this paper is to provide a mathematical description of the fundamental physics underlying the model. Subsequently, the proposed model is validated using existing experimental data. The remainder of the study focuses on the practical application of the model to an ignition assistance device. Specifically, this device is installed in a compression ignition engine and designed to enhance ignition in aviation-fueled high-altitude aircraft propulsion systems. The research sheds light on the mechanical impulse caused by the high-speed impact of the spray jet, leading to the accumulation of mechanical stress on the rigid body of the ignition assistance device. Previous studies on fluid-structure interaction have only considered the interaction between the gas phase and the solid wall. However, the SIWS model incorporates the additional impact of the impinging liquid spray jet. Consequently, the simulated stress distribution on the ignition assistance device can be estimated by considering both the gas-phase-induced term and the spray-induced term simultaneously.

Original languageEnglish (US)
Article number103325
JournalPhysics of Fluids
Issue number10
StatePublished - Oct 1 2023

ASJC Scopus subject areas

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


Dive into the research topics of 'Modeling of the spray-induced wall stress acting on the ignition assistance device'. Together they form a unique fingerprint.

Cite this