What is the ultimate limiting factor of a gas turbine engine?

Which of the following is the ultimate limiting factor of turbine engine operation? Turbine inlet temperature. The recurrent ingestion of dust or other fine airborne particulates into a turbine engine can result in… erosion damage to the compressor and turbine sections.

What are the common problem of a gas turbine?

Gas turbine engines may be affected in a number of ways, including: (a) increased deterioration of seals and bearings, (b) increased operation under low load conditions giving rise to the risk of blade flutter and fatigue damage, (c) increasing amounts of fatigue damage due to more frequent starts, load fluctuations …

What is the single most important limiting operational parameter in a gas turbine engine explain your answer?

The limiting factor for most gas turbines has been the turbine inlet temperature. With new cooling schemes using steam or conditioned air and breakthroughs in blade metallurgy, higher turbine temperatures have been achieved.

What limits the increase in gas turbine output and plant efficiency?

Gas turbines work on a constant-volume cycle, so power output depends on air mass flow. Warm air is less dense than cold air, so power output is reduced. Also, warm air needs more energy to compress it than cold air, removing more work from the compressor, increasing internal losses as it does so.

What factor limits maximum temperature in a gas turbine cycle?

Cycle temperature is limited by the maximum allowable turbine inlet temperature, the pattern factor produced by the combustor, and the cooling requirements of the combustor liner. Turbine materials and design establish the maximum gas temperature allowable to the turbine.

What is the most critical variable during turbine engine operation?

47 (8154) – Which of the following engine variables is the most critical during turbine engine operation? C- Turbine inlet temperature.

What is the main challenge in the development of gas turbine?

Environmental challenges with gas turbines include low levels of NOx, CO and soot amongst other pollutants. Specifically, ultra-low NOx combustor technology is required to meet the ozone depletion challenge. Researchers are facing concerns about the development of dry low-NOx stationary and aero engines.

What challenges do we face in the design of a modern gas turbine engine?

NOx emissions, Flexibility, Efficiency, Availability, Reliability are the top priorities.

What factors limit the maximum temperature in a gas turbine cycle?

High temperature corrosion and oxidation of the gas turbine material is a significant life limiting factor. The combustion gases, particularly from heavy fuels, contain several aggressive corrosion elements such as sodium, potassium, lead and vanadium which cause corrosion of the hot gas path components.

What is the basic operation of a gas turbine?

The basic operation of the gas turbine is a Brayton cycle with air as the working fluid: atmospheric air flows through the compressor that brings it to higher pressure; energy is then added by spraying fuel into the air and igniting it so that the combustion generates a high-temperature flow; this high-temperature …

Why is gas turbine efficiency low?

The decrease in the compressor airflow rate results in a decrease in the compressor power absorbed. Similarly, the reduction in the turbine flow also results in a decrease in turbine power. The compressor efficiency decrease is due primarily to the effects of compressor fouling.

What are the disadvantages of gas turbine?

Gas turbine plants have less vibrations when compared with reciprocating engines of the same speed. However the high frequency noise from the compressor is objectionable. 3. High temperatures impose severe restriction on the servicing conditions of the plant. 4.

What is a closed cycle gas turbine?

Now the air is cooled into the condenser at constant pressure and again sends to compressor. This process is run continuously which generate power. The air is again used into this system and does not exhaust into atmosphere, so it is known as the closed cycle gas turbine.

What is the efficiency of a simple cycle gas turbine?

The best heavy-duty gas turbines in simple cycle have an efficiency of 42\% (aeroderivatives better then combined cycle designed GT). The limit on the gas turbines is the temperature capability of the turbine inlet section (front turbine rows).

What are the applications of gas turbine?

The gas turbine is used where high power and speed are main consideration. Gas turbine is used in jet population unit in air craft, in ships as population unit, in supercharging system in automobile and also in electric generating station and in locomotives.