Gas Turbine Takeoff Control for High Ground Wind Conditions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Gas turbine engines face challenges during takeoff procedures, particularly when operating conditions such as high ground wind speed exceed predetermined thresholds, leading to potential damage from non-uniform airflow and increased risk of engine surge, especially when static takeoffs are initiated outside the engine's rated operational envelope.
Innovation Solution
A control unit is configured to automatically initiate a rolling takeoff procedure if ground wind speed information exceeds a predetermined threshold, coordinating gas turbine engine operations to prevent thrust asymmetry and ensure safe takeoff by running engines at intermediate power initially and then full power, thereby reducing pilot workload and protecting the engines from excessive stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a static takeoff procedure is initiated when ground wind speed exceeds the predetermined threshold, then the takeoff can proceed without delay, but the gas turbine engine is at risk of damage from non-uniform airflow and engine surge
Solution Approach 1:
The control unit performs preliminary assessment of ground wind speed before initiating takeoff. If the wind speed exceeds the threshold, the system proactively selects the rolling takeoff procedure in advance, preventing the engine from being exposed to harmful non-uniform airflow conditions during a static takeoff attempt
Solution Approach 2:
The control unit acts as an intermediary between the pilot's takeoff intent and the actual engine operation. It automatically determines the appropriate takeoff procedure based on wind speed conditions and coordinates engine power application accordingly, removing the need for manual pilot judgment and ensuring the correct procedure is followed
2Reliability
If the pilot manually determines takeoff procedure based on ground wind speed, then the engine operation can be optimized for safety, but the pilot workload increases and errors may occur
Solution Approach 1:
The control unit performs self-service by automatically monitoring ground wind speed and autonomously selecting the appropriate takeoff procedure. The system uses its own sensors and processing capabilities to determine whether conditions warrant a static or rolling takeoff, eliminating the need for the pilot to manually check wind speed and make procedural decisions
Solution Approach 2:
The control unit continuously receives feedback from wind speed sensors and other operational parameters. Based on this real-time feedback, the system automatically adjusts and coordinates engine power application to match the optimal takeoff procedure, ensuring safety while reducing pilot workload
3Reliability
If a rolling takeoff procedure is used when ground wind speed is below the threshold, then the engine is protected from damage, but the takeoff time increases
Solution Approach 1:
The system dynamically selects the takeoff procedure based on real-time ground wind speed conditions. When wind speed is below the threshold, the control unit enables the faster static takeoff procedure; when wind speed exceeds the threshold, it automatically transitions to the rolling takeoff procedure, optimizing both safety and performance for current conditions
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A gas turbine engine (20) includes a control unit (46) to command the gas turbine engine (20) to perform one of a rolling takeoff procedure and an unrestricted takeoff procedure. The control unit (46) is configured to command the gas turbine engine (20) to perform the rolling takeoff procedure when information required to determine whether the unrestricted takeoff procedure can be performed is unavailable to the control unit (46).