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首页> 外文会议>Powertrain and Fluid Systems Conference and Exhibition >Comparison between in-cylinder PIV measurements, CFD simulations and steady-flow impulse torque swirl meter measurements
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Comparison between in-cylinder PIV measurements, CFD simulations and steady-flow impulse torque swirl meter measurements

机译：缸内PIV测量，CFD仿真和稳压脉冲扭矩旋流计测量的比较

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In-cylinder flow measurements, conventional swirl measurements and CFD-simulations have been performed and then compared. The engine studied is a single-cylinder version of a Scania D12 that represents a modern heavy-duty truck size engine. Bowditch-type optical access and flat piston is used. The cylinder head was also measured in a steady-flow impulse torque swirl meter. From the two-dimensional flow-field, which was measured in the interval from -200°ATDC to 65°ATDC at two different positions from the cylinder head, calculations of the vorticity, turbulence and swirl were made. A maximum in swirl occurs at about 50°before TDC while the maximum vorticity and turbulence occurs somewhat later during the compression stroke. The swirl center is also seen moving around and it does not coincide with the geometrical center of the cylinder. The simulated flow-field shows similar behavior as that seen in the measurements. The steady-flow impulse torque swirl meter measurements compared with swirl calculated from PIV-measurement and CFD simulations gives better understanding of the common way of swirl measuring.
机译：缸内流量测量，已经进行了传统的涡流测量和CFD模拟，然后进行比较。研究的发动机是一个单缸版的斯堪尼亚D12，代表现代重型卡车尺寸发动机。使用Bowditch型光学接入和平面活塞。还在稳定脉冲扭矩旋流表中测量气缸盖。从二维流场，在从-200°ATDC到65°ATDC的间隔中测量，从气缸盖的两个不同位置，制造涡旋，湍流和旋涡的计算。在TDC之前，涡旋中的最大值发生在大约50°，而在压缩冲程期间稍后发生最大涡流和湍流。漩涡中心也被视为环绕，并且与气缸的几何中心不一致。模拟的流场显示出类似于测量中所见的类似行为。与由PIV测量和CFD模拟计算的涡流相比的稳定脉冲扭矩旋流计测量可以更好地了解旋流测量的常见方式。

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