Work

Response of a nonevaporating monodisperse spray in a uniform laminar gas flow to acoustic perturbations

Year: 2025

Type: article

Abstract: Understanding the interaction between an acoustic field and a dispersed cloud of droplets in particle-laden flows is critical, particularly for thermoacoustic instabilities in spray flame combustors. This study develops analytical expressions for particle velocity and number density, leading to insights into the particle clustering mechanism. While individual droplets may remain largely unaffected by acoustic perturbations, the droplet population spatial distribution can still undergo significant disturbances. An evanescent convective wave in the particle velocity response is identified as the primary driver of clustering, which is predominantly a convective phenomenon at low Mach numbers.

Source: Physical Review Fluids

DOI: 10.1103/physrevfluids.10.024302

Authors: Titouan Moriniere, Thierry Schuller

Institutions: Office National d'Études et de Recherches Aérospatiales, Safran Aircraft Engines (France), Institut Universitaire de France

Language: English

Topic: Particle Dynamics in Fluid Flows

Subfield: Ocean Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: Association Nationale de la Recherche et de la Technologie, Safran Aircraft Engines, European Research Council

Award: G7433228574