Abstract: A flow conditioner for conditioning a fluid flow comprises a pipe that has a pipe axis and that can be flowed through by a fluid in the direction of the pipe axis; and at least one hub body that is rotationally symmetrical with respect to an axis of symmetry and that is fixed in the pipe such that the axis of symmetry coincides with the pipe axis, wherein the hub body fixed in the pipe has an onflow region that is arched outwardly against the onflow direction.

Abstract: A throughflow measurement system comprises a measurement body that has an inlet flange, an outlet flange and a fluid passage, wherein the fluid passage has a passage axis; an ultrasonic measurement apparatus integrated into the measurement body; and a flow conditioner arranged upstream of the ultrasonic measurement apparatus in the fluid passage. An arrangement of bores for fastening means is provided at the outlet flange, wherein an axially extending outlet fastening region of the measurement body is defined by the length of the bores. The ultrasonic measurement apparatus has at least one reflection measurement path that is spanned by a first ultrasonic transducer, a reflector and a second ultrasonic transducer and that extends in a measurement plane through the fluid passage such that the second ultrasonic transducer is arranged downstream of the first ultrasonic transducer. The second ultrasonic transducer disposed downstream is arranged in or projects into the outlet fastening region.

Abstract: A flow measurement device for determining the flow rate of a fluid flowing in a line is provided, wherein the flow measurement device has a measurement element arranged at a measurement point in the line for a selective detection of a measurement value of the flowing fluid, a control and evaluation unit to determine the flow rate from the measurement value, and a flow guidance element arranged upstream of the measurement point with respect to the direction of flow. In this respect, the flow guidance element supplies a representative portion of the flow to the measurement point.

Abstract: A throughflow measurement system for measuring a fluid throughflow through a pipe comprises a first measurement arrangement that comprises at least two ultrasonic transducers and that is configured to determine a value for the fluid throughflow through the pipe on the basis of transit times of ultrasonic signals transmitted and received with and against the flow; a second measurement arrangement that comprises a plurality of hot-wire sensors that are arranged distributed over the cross-section of the pipe and that are each configured to determine a local flow value; and an evaluation device that is in signal connection with the first measurement arrangement and with the second measurement arrangement and that is configured to determine a flow profile on the basis of the local flow values determined by the hot-wire sensors and to modify the value for the fluid throughflow, which is determined by the first measurement arrangement, on the basis of the determined flow profile.

Abstract: A flow conditioner for conditioning a fluid flow comprises a pipe that has a pipe axis and that can be flowed through by a fluid in the direction of the pipe axis; and at least one hub body that is rotationally symmetrical with respect to an axis of symmetry and that is fixed in the pipe such that the axis of symmetry coincides with the pipe axis, wherein the hub body fixed in the pipe has an onflow region that is arched outwardly against the onflow direction.

Abstract: The invention relates to a measurement apparatus for measuring a flow rate of a fluid that flows with a main direction of flow in a circular line comprising an inlet section for conducting the fluid from the circular line into the measurement apparatus; an outlet section for conducting the fluid from the measurement apparatus into the circular line; a measurement section for connecting the inlet section to the outlet section; at least one ultrasound device for transmitting and/or receiving ultrasound waves, wherein the ultrasound device is arranged at a wall of the measurement section; and an evaluation unit for carrying out a time of flight difference measurement and for determining the flow rate, wherein the inlet section has a first superelliptic transitional shape and the outlet section has a second superelliptic transitional shape and the measurement section has a rectangular form, in particular having rounded corners.

Abstract: The invention relates to a measurement apparatus for measuring a flow rate of a fluid that flows with a main direction of flow in a circular line comprising an inlet section for conducting the fluid from the circular line into the measurement apparatus; an outlet section for conducting the fluid from the measurement apparatus into the circular line; a measurement section for connecting the inlet section to the outlet section; at least one ultrasound device for transmitting and/or receiving ultrasound waves, wherein the ultrasound device is arranged at a wall of the measurement section; and an evaluation unit for carrying out a time of flight difference measurement and for determining the flow rate, wherein the inlet section has a first superelliptic transitional shape and the outlet section has a second superelliptic transitional shape and the measurement section has a rectangular form, in particular having rounded corners.

Abstract: The invention relates to a flow measuring device for measuring a parameter of a flow formed from a fluid which flows in a main direction of flow in a line, comprising a first line section for conducting the fluid out of the main direction of flow; a second line section for conducting the fluid back into the main direction of flow; a line connection section for connecting the first line section to the second line section; at least one ultrasound device for transmitting and/or receiving ultrasound waves; and an evaluation unit for carrying out a transit-time difference measurement and for determining the parameter, wherein at least one swirl generating unit for generating a swirl is provided which is arranged downstream of the first line section such that the generated swirl is directed in a direction which is opposite to a direction of a swirl present downstream of the first line section and upstream of the swirl generation unit.

Abstract: The invention relates to a flow measuring device for measuring a parameter of a flow formed from a fluid which flows in a main direction of flow in a line, comprising a first line section for conducting the fluid out of the main direction of flow; a second line section for conducting the fluid back into the main direction of flow; a line connection section for connecting the first line section to the second line section; at least one ultrasound device for transmitting and/or receiving ultrasound waves; and an evaluation unit for carrying out a transit-time difference measurement and for determining the parameter, wherein at least one swirl generating unit for generating a swirl is provided which is arranged downstream of the first line section such that the generated swirl is directed in a direction which is opposite to a direction of a swirl present downstream of the first line section and upstream of the swirl generation unit.