A method of evaluating integrated running energy of a vehicle in a wind tunnel may include estimating change in fuel efficiency according to change of vehicle parts thereby facilitating precise measurement of running energy.

A method of evaluating integrated running energy of a vehicle in a wind tunnel may include estimating change in fuel efficiency according to change of vehicle parts thereby facilitating precise measurement of running energy.

The present disclosure relates to the technical field of aerodynamic and acoustic measurement, in particular to a comprehensive performance test platform for acoustic liner. Based on this comprehensive performance test platform for acoustic liner, the stress of the measured acoustic liner under high sound intensity can be measured by using strain gauges arranged on the measured acoustic liner, the aerodynamic drag of the measured acoustic liner can be measured by using the drag balance, and the acoustic performance parameters of the measured acoustic liner can be calculated based on the sound pressure data obtained by the microphone array. With this test platform, the stress, the aerodynamic drag and the acoustic performance parameters of the measured acoustic liner can be measured simultaneously, which overcomes the problem of inaccurate experimental data obtained in inconsistent experimental conditions caused by conventional separate acoustic liner tests.

The present disclosure relates to the technical field of aerodynamic and acoustic measurement, in particular to a comprehensive performance test platform for acoustic liner. Based on this comprehensive performance test platform for acoustic liner, the stress of the measured acoustic liner under high sound intensity can be measured by using strain gauges arranged on the measured acoustic liner, the aerodynamic drag of the measured acoustic liner can be measured by using the drag balance, and the acoustic performance parameters of the measured acoustic liner can be calculated based on the sound pressure data obtained by the microphone array. With this test platform, the stress, the aerodynamic drag and the acoustic performance parameters of the measured acoustic liner can be measured simultaneously, which overcomes the problem of inaccurate experimental data obtained in inconsistent experimental conditions caused by conventional separate acoustic liner tests.

In an embodiment, a test section comprises at least one surface defining an at least partially enclosed space. The at least partially enclosed space defines an airflow path for air to flow. The test section also comprises a nozzle disposed in the at least partially enclosed space. The nozzle is configured to spray an agricultural spray and is positioned to emit the agricultural spray such that at least a section of the agricultural spray exhibits a non-parallel angle relative to the airflow path defined by the at least partially enclosed space. The test section further comprises at least one stimulus source positioned to illuminate at least a portion of the agricultural spray adjacent to the nozzle. Additionally, the test section comprises at least one detector positioned to image at least the portion of the agricultural spray adjacent to the nozzle.

In an embodiment, a test section comprises at least one surface defining an at least partially enclosed space. The at least partially enclosed space defines an airflow path for air to flow. The test section also comprises a nozzle disposed in the at least partially enclosed space. The nozzle is configured to spray an agricultural spray and is positioned to emit the agricultural spray such that at least a section of the agricultural spray exhibits a non-parallel angle relative to the airflow path defined by the at least partially enclosed space. The test section further comprises at least one stimulus source positioned to illuminate at least a portion of the agricultural spray adjacent to the nozzle. Additionally, the test section comprises at least one detector positioned to image at least the portion of the agricultural spray adjacent to the nozzle.

The present disclosure provides PCB wind tunnel test equipment. The PCB wind tunnel test device includes: a flow-stabilizing structure, which includes: a box used to provide flow channels for air entering the flow-stabilizing structure; flow-stabilizing plates, which are inserted into the cavities of the box in a layered manner; a wind source, arranged at an air inlet of the flow-stabilizing structure; a test device, arranged at the outlet of the flow-stabilizing structure. When the flow-stabilizing structure receives the wind energy provided by the wind source, the state of the air flow is adjusted by flow stabilization, so that the test device can test the air passing through the flow-stabilizing structure. The present invention solves the problem that conventional wind tunnels cannot test at low air volumes and enables PCB testing at different ambient temperatures.

The present disclosure provides PCB wind tunnel test equipment. The PCB wind tunnel test device includes: a flow-stabilizing structure, which includes: a box used to provide flow channels for air entering the flow-stabilizing structure; flow-stabilizing plates, which are inserted into the cavities of the box in a layered manner; a wind source, arranged at an air inlet of the flow-stabilizing structure; a test device, arranged at the outlet of the flow-stabilizing structure. When the flow-stabilizing structure receives the wind energy provided by the wind source, the state of the air flow is adjusted by flow stabilization, so that the test device can test the air passing through the flow-stabilizing structure. The present invention solves the problem that conventional wind tunnels cannot test at low air volumes and enables PCB testing at different ambient temperatures.

The present invention discloses a pollutant generation system. The pollutant generation system includes a pollution source and a pollutant emitter. The pollutant emitter is connected to the pollution source. The pollution source is composed of two gases including air and methane. The flows of the gases are strictly controlled. Then, the gases enter a magnetic bead glass bottle. Due to the disturbance of magnetic beads to the flowing of the gases, the gases are sufficiently disordered, and the two gases are sufficiently mixed by using a spiral tube to generate a uniform and stable pollution source.

The present invention discloses a pollutant generation system. The pollutant generation system includes a pollution source and a pollutant emitter. The pollutant emitter is connected to the pollution source. The pollution source is composed of two gases including air and methane. The flows of the gases are strictly controlled. Then, the gases enter a magnetic bead glass bottle. Due to the disturbance of magnetic beads to the flowing of the gases, the gases are sufficiently disordered, and the two gases are sufficiently mixed by using a spiral tube to generate a uniform and stable pollution source.