THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

Authors of this Paper

External Links

Zongwei Zhang

,

Hao Chen

,

Cong Liu

,

Qingkun Meng

online first only

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 (45ºC, 55ºC, 65ºC), cooling air velocity (2 m/s - 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 71ºC from 315ºC 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
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Effect of inlet conditions on the thermal insulation performance of marine gas turbine exhaust systems