Abstract: In one embodiment, a multi-path ultrasonic flow meter for determining the flow rate of a fluid in a conduit is disclosed comprising at least two transducer pairs attached to the conduit at two chord locations, one greater than and one less than a mid-radius chord, wherein the composite ratio the two path velocities to the flow rate is substantially constant over the range of Reynolds numbers. In another embodiment, a method of determining the flow rate of a fluid in a conduit is disclosed comprising the steps of determining a composite velocity by determining a weighted average of a plurality of path velocities, determining a chord velocity ratio based on the path velocities, determining a profile correction factor based on the composite velocity and the chord velocity ratio, and determining the flow rate based on the composite velocity and the profile correction factor.

Abstract: In one embodiment, a multi-path ultrasonic flow meter for determining the flow rate of a fluid in a conduit is disclosed comprising at least two transducer pairs attached to the conduit at two chord locations, one greater than and one less than a mid-radius chord, wherein the composite ratio the two path velocities to the flow rate is substantially constant over the range of Reynolds numbers. In another embodiment, a method of determining the flow rate of a fluid in a conduit is disclosed comprising the steps of determining a composite velocity by determining a weighted average of a plurality of path velocities, determining a chord velocity ratio based on the path velocities, determining a profile correction factor based on the composite velocity and the chord velocity ratio, and determining the flow rate based on the composite velocity and the profile correction factor.

Abstract: A swirler having cross-sectional area comparable to the area of a detonation chamber is placed upstream of the detonation chamber to enhance the fuel-air mixing. The swirler has a first region and a second region, each of which induces swirl in the flow through the swirler. Each region induces a different direction of swirl in the flow. The residual net swirl present in the flow downstream of the swirler is controlled by the relative properties of each region of the swirler. The swirler also provides high optical blockage to inhibit the upstream propagation of flow due to the detonation shockwave.

Abstract: A thermal flow measurement system includes at least first and second sensors for detecting heat loss due to fluid flowing in a conduit. The first and second sensors are spaced a predetermined distance apart. An electronics subsystem is responsive to the at least first and second sensors and configured to receive input signals from the first and second sensors including direct current and alternating current components, and to output alternating current signals for determination of flow velocity of the fluid.

Abstract: A system for controlling a cooking appliance in the preparation of a food item includes a computer-readable label provided on a package of a food item to be cooked in accordance with a set of cooking instructions with the label having contents identifying the food item, a database containing sets of cooking instructions for different food items, and a subsystem for reading the contents of the label, communicating the contents of the label to the database, accessing the set of cooking instructions for the food item from the database, and transferring the cooking instructions into a cooking appliance for execution by the consumer by operating the appliance.