Where are the fishmouth seals located in a gas turbine system?

The fishmouth seals are crucial components in the high-pressure turbine (HPT) section of a gas turbine system. Their primary function is to maintain the seal integrity between the turbine rotor and the turbine casing. By minimizing the leakage of gases around the rotor, they help enhance the turbine's efficiency and performance.

Positioning the seals at both ends of the lines in the HPT is essential for creating an effective barrier that controls the flow of hot gases and minimizes any energy losses. Maintaining proper sealing in this area is vital as it helps ensure that the high-energy gases contribute to driving the turbine blades, thus maximizing the engine's output and efficiency.

Understanding the placement and purpose of these seals allows for better maintenance practices and awareness of potential failure points within the turbine assembly. In contrast, the other options do not accurately identify the location of fishmouth seals, as they are not typically situated at the front end of the turbine, within the combustion chamber, or at the rear of the gas turbine. This specific placement reflects their importance in managing the conditions within the high-pressure turbine environment.