THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Zongwei Zhang

,

Hao Chen

,

Cong Liu

,

Qingkun Meng

EFFECT OF INLET CONDITIONS ON THE THERMAL INSULATION PERFORMANCE OF MARINE GAS TURBINE EXHAUST SYSTEMS

ABSTRACT
A marine gas turbine insulation solution was designed to reduce exhaust system temperatures. The effects of cooling gas temperature (45°C, 55°C, 65°C), cooling air velocity (2-10 m/s), and a range of classic aerodynamic conditions ranging on the thermal insulation performance of the gas turbine exhaust system were investigated using numerical simulations. The results indicate that the use of aerogel insulation material effectively reduces the average temperature of the exterior volute casing to 71°C from 315°C under rated turbine conditions. The exterior volute casing temperature increases with higher cooling gas inlet temperatures but decreases with increasing cooling gas inlet velocities. Additionally, alterations in the aerodynamic conditions at the gas inlet will induce changes in the thermal insulation performance of the exhaust system, and excessive circumferential flow velocities can cause localized overheating in the exhaust volute casing.
KEYWORDS
Marine gas turbine engine, Exhaust volute, thermal protection, Aerogel, numerical simulation
PAPER SUBMITTED: 2024-02-06
PAPER REVISED: 2024-04-22
PAPER ACCEPTED: 2024-05-09
PUBLISHED ONLINE: 2024-08-18
DOI REFERENCE: https://doi.org/10.2298/TSCI240206160Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 1, PAGES [63 - 76]
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Effect of inlet conditions on the thermal insulation performance of marine gas turbine exhaust systems

2025 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence