Sensor for high temperature turbulent flow

A turbulence sensor for use in high temperature fluid flows, comprising:

• a substrate;
• a cooling system configured to apply cooling to the substrate;
• a measuring system for measuring fluctuations in the temperature of the substrate;
• a control system for controlling the cooling and measuring systems in order to:
• apply a plurality of different levels of cooling to a region of the substrate at a corresponding plurality of different times, and measure the fluctuations in the temperature of the region of the substrate at each of the plurality of different levels of cooling;
• and
• a calculation unit for determining an amount of turbulence in the high temperature fluid flow and/or a size of temperature fluctuations in the high temperature fluid flow, based on the fluctuations in temperature measured at each of the plurality of different levels of cooling.

A turbulence sensor for use in high temperature fluid flows, comprising:

• one or more substrates;
• a cooling system configured to apply cooling to the one or more substrates;
• a measuring system for measuring fluctuations in the temperature of the one or more substrates in regions where different levels of cooling from the cooling system are applied;
• a calculation unit for determining an amount of turbulence in the high temperature fluid flow and/or a size of temperature fluctuations in the high temperature fluid flow, based on the fluctuations in temperature measured at each of the plurality of different levels of cooling.