Publications

Entropy transfer function measurement with tunable diode laser absorption spectroscopy

B.Dharmaputra, S. Shcherbanev, Audrey Blonde, Bruno Schuermans, Nicolas Noiray
Proc Combust Inst, vol 39, pp. 4621-4630, 2023

In this work, a temperature sensor based on laser absorption spectroscopy is developed and evaluated in a single stage combustor. This sensor is particularly important to quantify the effect of temperature fluctuation in the sequential mixing channel on the sequential flame.

Thermoacoustic stabilization of a sequential combustor with ultra-low-power nanosecond repetitively pulsed discharges

B. Dharmaputra, S. Shcherbanev, B. Schuermans and N. Noiray
Combustion and Flame, vol. 258, pp. 113101, 2023

This work demonstrates the stabilization of an atmospheric sequential combustor with NRPD with a plasma power of 1.5 x 10^-3 percent of the thermal power of the flames. This marks a foundational stepping stone in the real implementation of such technology in gas turbines.

Effect of plasma-​flow coupling on the ignition enhancement with non-​equilibrium plasma in a sequential combustor

S. A. Shcherbanev, Q. Malé, B. Dharmaputra, R. Solana-​Pérez and N. Noiray
Journal of Physics D: Applied Physics, Vol. 55, 2022

This paper presents crucial insights into the absolute values of plasma parameters, including the dynamics of rapid gas heating and electron number density, during nanosecond spark discharges within a hot vitiated flow. Additionally, it explores the coupling between discharge geometry and dynamics, with a focus on the pulse repetition frequency dependence. The study systematically investigates the efficiency of flame initiation and enhancement with Nanosecond Repetitively Pulsed Discharges (NRPD) across varying reactivity levels of the sequential flame. These findings constitute a pivotal step toward comprehending the impact of NRPD on the dynamics of sequential flames, contributing significantly to the understanding of the mechanisms involved in stabilizing thermoacoustically unstable combustors.

Anchoring of premixed jet flames in vitiated crossflow with pulsed nanosecond spark discharge

S. A. Shcherbanev, T. Morinière, R. Solana-Pérez, M. Weilenmann, Y. Xiong, U. Doll, N. Noiray
Applications in Energy and Combustion Science, 1, 100010.

The paper presents experimental findings on the impact of nanosecond repetitively pulsed discharge (NRPD) on flame stabilization and anchoring in a premixed jet within a hot vitiated crossflow. Through direct imaging and emission spectroscopy, the study reveals NRPD's ability to robustly anchor flames, influencing lift-off distance and enhancing OH radical production. This understanding is crucial for improving combustion efficiency, predicting NOx emissions, and designing cooling technologies. The study positions NRPD as a promising technology for real engine applications, offering insights into its effectiveness under various conditions, contributing to advancements in flame stabilization.

Jetting axial flow induced by nanosecond repetitively pulsed discharges in quiescent ambient air

S. A. Shcherbanev, T. Krzymuski, Y. Xiong, N. Noiray
Journal of Physics D: Applied Physics, 55(38), 385202.

This paper presents a dual focus, investigating the behavior of nanosecond repetitively pulsed discharges (NRPDs) at elevated gas densities and characterizing the associated hydrodynamic effects. The study delves into the dynamics of NRPDs under varied conditions, shedding light on their behavior in environments with increased gas density. Additionally, the hydrodynamic effects of NRPDs are thoroughly examined, providing valuable insights into their impact on the surrounding flow dynamics.