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Browsing by Author "Sun, Xiaoxiao"

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Application of CFD zooming for preliminary design of a low emmisions combustor.

Sun, Xiaoxiao (2018-10)

The design of low emissions combustors is particularly challenging as there is a requirement to deliver designs that meet a large number of performance, emissions and operability (often conflicting) objectives. There is ...
Characterising hydrogen micromix flames: combustion model calibration and evaluation

López-Juárez, Marcos; Sun, Xiaoxiao; Sethi, Bobby; Gauthier, Pierre Q.; Abbott, David (American Society of Mechanical Engineers, 2021-01-11)

Hydrogen micromix combustion is a promising concept to reduce the environmental impact of both aero and land-based gas turbines by delivering carbon-free and ultra-low-NOx combustion without the risk of autoignition or ...
A comparative analysis of different hydrogen production methods and their environmental impact

Nnabuife, Somtochukwu Godfrey; Darko, Caleb Kwasi; Obiako, Precious Chineze; Kuang, Boyu; Sun, Xiaoxiao; Jenkins, Karl W. (MDPI, 2023-11-29)

This study emphasises the growing relevance of hydrogen as a green energy source in meeting the growing need for sustainable energy solutions. It foregrounds the importance of assessing the environmental consequences of ...
Comparison of hydrogen micromix flame transfer functions determined using RANS and LES

McClure, Jonathan; Abbott, David; Agarwal, Parash; Sun, Xiaoxiao; Babazzi, Giulia; Sethi, Vishal; Gauthier, Pierre Q. (ASME, 2019-11-05)

Hydrogen has been proposed as an alternative fuel to meet long term emissions and sustainability targets, however due to the characteristics of hydrogen significant modifications to the combustion system are required. The ...
Comparison of tabulated and complex chemistry turbulent-chemistry interaction models with high fidelity large eddy simulations on hydrogen flames

Zghal, M.; Sun, Xiaoxiao; Gauthier, Pierre Q.; Sethi, Vishal (American Society of Mechanical Engineers, 2021-01-11)

Hydrogen micromix combustion is a promising concept to reduce the environmental impact of both aero and land-based gas turbines by delivering carbon-free and ultra-low-NOx combustion without the risk of autoignition or ...
Development and application of a preliminary design methodology for modern low emissions aero combustors

Liu, Yize; Sun, Xiaoxiao; Sethi, Vishal; Li, Yi-Guang; Nalianda, Devaiah; Abbott, David; Gauthier, Pierre Q.; Xiao, Bairong; Wang, Lu (SAGE, 2020-04-23)

In this article, a preliminary design framework containing a detailed design methodology is developed for modern low emissions aero combustors. The inter-related design elements involving flow distribution, combustor sizing, ...
Enabling cryogenic hydrogen-based CO2-free air transport: meeting the demands of zero carbon aviation

Sethi, Vishal; Sun, Xiaoxiao; Nalianda, Devaiah; Rolt, Andrew Martin; Holborn, Paul; Wijesinghe, Charith; Xisto, Carlos; Jonsson, Isak; Grönstedt, Tomas; Ingram, James; Lundbladh, Anders; Isikveren, Askin; Williamson, Ian; Harrison, Tom; Yenokyan, Anna (IEEE, 2022-06-02)

Flightpath 2050 from the European Union (EU) sets ambitious targets for reducing the emissions from civil aviation that contribute to climate change. Relative to aircraft in service in year 2000, new aircraft in 2050 are ...
Injector design space exploration for an ultra-low NOx hydrogen micromix combustion system

Agarwal, Parash; Sun, Xiaoxiao; Gauthier, Pierre Q.; Sethi, Vishal (ASME, 2019-11-05)

The depletion of fossil fuel resources, as well as the increasing environmental concerns have become the driving forces towards the research and development necessary for the introduction of alternative fuel such as hydrogen ...
Numerical investigation into the impact of injector geometrical design parameters on hydrogen micromix combustion characteristics

Sun, Xiaoxiao; Agarwal, Parash; Carbonara, Francesco; Abbott, David; Gauthier, Pierre Q.; Sethi, Bobby (American Society of Mechanical Engineers, 2021-01-11)

Hydrogen micromix combustion is a promising concept to reduce the environmental impact of both aero and land-based gas turbines by delivering carbon-free and ultra-low-NOx combustion without the risk of autoignition or ...
Numerical investigation into the impact of operating boundary conditions on NOx formation in hydrogen micromix combustion system

Singh, Gaurav; Zghal, Malika; Sun, Xiaoxiao; Gauthier, Pierre; Sethi, Vishal (American Society of Mechanical Engineers, 2023-09-28)

Hydrogen micromix combustion is a promising technology for achieving zero mission-level carbon emissions with ultra-low NOx potential. A reduced-order NOx emissions prediction model is essential for preliminary hydrogen ...
Numerical investigation of potential cause of instabilities in a hydrogen micromix injector array

Sun, Xiaoxiao; Abbott, David; Singh, Abhay Vir; Gauthier, Pierre; Sethi, Bobby (American Society of Mechanical Engineers, 2021-09-16)

Hydrogen micromix combustion is a promising concept to reduce the environmental impact of both aero and land-based gas turbines by delivering carbon-free and ultra-low-NOx combustion. The high-reactivity and wide flammability ...
Numerical investigation of the breakup mode and trajectory of liquid jet in a gaseous crossflow at elevated conditions

Zhu, Yu; Sun, Xiaoxiao; Sethi, Vishal; Gauthier, Pierre; Guo, S.; Bai, R.; Yan, D. (Cambridge University Press, 2021-09-13)

The commercial Computational Fluid Dynamics (CFD) software STAR-CCM+ was used to simulate the flow and breakup characteristics of a Liquid Jet Injected into the gaseous Crossflow (LJIC) under real engine operating conditions. ...
On the development of an experimental rig for hydrogen micromix combustion testing

Giannouloudis, Alexandros; Sun, Xiaoxiao; Corsar, Michael; Booden, Scott J.; Singh, Gaurav; Abbott, David; Nalianda, Devaiah; Sethi, Bobby (The Combustion Institute, 2021-04-15)

This work describes the development of a combustion rig, aimed at testing hydrogen-fuelled micromix burners for aero gas-turbines at pressures up to 15barg, inlet-air temperatures up to 600K and equivalence ratios (Φ) ...
Preliminary aerodynamic design methodology for aero engine lean direct injection combustors

Sun, Xiaoxiao; Liu, Yize; Sethi, Vishal; Li, Jie (Cambridge University Press, 2017-06-21)

The Lean Direct Injection (LDI) combustor is one of the low-emissions combustors with great potential in aero-engine applications, especially those with high overall pressure ratio. A preliminary design tool providing basic ...
Preliminary CFD Study on the effect of fuel injector coking on fuel spray characteristics

Agarwal, Parash; Sethi, Vishal; Gauthier, Pierre Q.; Sun, Xiaoxiao; Liu, Yize (American Society of Mechanical Engineers (ASME), 2018-02-02)

Fuel injector coking involves deposit formation on the external or the internal surfaces of an injector or nozzle. This deposition of carbonaceous particles can result in uneven fuel-spray characteristics or localised ...
Review of modern low emissions combustion technologies for aero gas turbine engines

Liu, Yize; Sun, Xiaoxiao; Sethi, Vishal; Nalianda, Devaiah; Li, Yi-Guang; Wang, Lu (Elsevier, 2017-09-12)

Pollutant emissions from aircraft in the vicinity of airports and at altitude are of great public concern due to their impact on environment and human health. The legislations aimed at limiting aircraft emissions have ...
Thermoacoustic behaviour of a hydrogen micromix aviation gas turbine combustor under typical flight conditions

Abbott, David; Giannotta, Alessandro; Sun, Xiaoxiao; Gauthier, Pierre; Sethi, Vishal (American Society of Mechanical Engineers, 2021-09-16)

Hydrogen micromix is a candidate combustion technology for hydrogen aviation gas turbines. The introduction and development of new combustion technologies always carries the risk of suffering from damaging high amplitude ...
Validation of a stochastic breakup model for turbulent jets in high-speed crossflow: assessment of turbulent interactions and sensitivity to boundary conditions

Zghal, Malika; Sun, Xiaoxiao; Gauthier, Pierre Q.; Sethi, Vishal (Begell House, 2023-04-25)

Improving the mixing of fuel and air by injecting a turbulent liquid fuel jet into a high-speed cross-flowing gas can reduce the emissions of gas turbine applications. To facilitate and hasten the development of such ...

Browsing by Author "Sun, Xiaoxiao"

Browsing by Author "Sun, Xiaoxiao"

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