Instrumentation Lab Gap Matrix

Description

In order to highlight the research priorities in terms of Gas Turbine Instrumentation Development, PIWG on the US side and EVI-GTI on the EU side have issued a Lab Gap Matrix. A first EVI-GTI version was released in 2004, then updated in 2009, containing measured quantities on one axis mapped against engine location / working environment on the other axis.

Measurement types were structured as follows and after a voting process among OEM’s, each area was highlighted in green, yellow or red depending on their level of maturity or even availability.

Aerodynamics and Performance

issued 22 February 2017

Measurand/Measurement	Externals and shafts	Intake, Compressor (Front) and Fan	Compressor (rear)	Combustion system	HP Turbine	LP Turbine	Exhaust
Pressure (MKS)	1 bar	1-10 bar	10-45 bar	<45 bar	25-45 bar	1-20 bar	1 bar
Pressure (Eng)	15psi	15-150psi	150psi-650psi	650psi	370psi-650psi	15psi-300psi	15psi
Temperature (MKS)	-40 to 300°C	-40 to 300°C	300 to 700°C+	700C-2400°C	1000C-1800°C	700C-1000°C	700°C+
Temperature (Eng)	-40 to 570F	-40 to 570F	570 to 1300F+	1300F-4300F	1800F-3300F	1300F-1800F	1300F
TRL assessments = Red 1-4, Yellow 5-6, Green 7-9
1. Airflow Measurements
Intake/core mass flow (Total/static P)
Offtake flow: orrifice plates/nozzles
Intake condensation/water content
Sand/ash/particulate
Multiphase breather flows
other
2. Gas Path Measurements
2a. Gas Path: Dynamic Pressure Measurements
Piezoelectric
Piezoresistive
Capacitance
Semi infinite line - remote
Plasma discharge
MEMS
Fiber optic (FPI, FBG)
Traversible dynamic pressure
other
2b. Gas Path: Temperature Measurements
Rakes, Including noble metals
Metallic Thermocouples
Ceramic thermocouple alloys
Fiber optic (FPI/FBG/BBR)
Absorption technologies
Laser based technologies - planar
2 D Mapping Tomography
Seeded flowpath technologies
Acoustic pyrometry
Intermittant choked nozzle
Traversing
other
2c. Gas Path: Pressure Measurements
Rakes, Including noble metals
Traversible steady pressure
other
3. Fluid flow
Liquid fuel: Bulk meter
Liquid fuel: Turbine
Liquid fuel: Coriolis
Liquid fuel density
Gas: Coriolis
Gas calorific value
other
4. Emission Species - Exhaust
Sampling and ported to analyzer
Smoke number (filter)
Smoke number Non intrusive (LII)
Cabin Air Quality
MEMS direct insertion
UV resonant absorption
Coherent Anti-Raman Spectroscopy (CARS)
laser induced fluorescence (LIF)
Tunable diode laser (TDL) technologies
other
5. Torque and Thrust
Torque meters
In engine shaft torque
other
6.Noise
Dynamic pressure - microphone
Semi infinite lines
Radiative vapor analysis
Fiberoptic technologies
other
Enabling thechnology: Wires and Interconnects
Hardwire
Transition technology
Connectors
Soft/flex wire
Fiberoptic cables
Wireless

External links

• Propulsion Instrumentation Working Group (PIWG)

• EVI-GTI and
• EVI-GTI Wiki at https://wiki.evi-gti.eu