In this study, a throttling venturi valve with adjustable area was designed to control the thrust of a monopropellant thruster using hydrogen peroxide. The flow rate control characteristics of the throttling venturi valve were investigated based on the pintle stroke and upstream pressure of the venturi. Three kinds of experiments were conducted: pressure and flow rate measurement according to pintle stroke and venturi upstream pressure, determination of critical pressure ratios under various conditions, flow rate control performance through open-loop control and feedback control of an actuator. The pressures were measured at the upstream, throat, and downstream of the venturi. It was observed that the flow rate changed in proportion to the stroke and upstream pressure. Below a stroke of 10 mm, the critical pressure ratio gradually decreased as the stroke and upstream decreased. However, above a stroke of 10 mm, the critical pressure ratio converged to a value between 0.7 and 0.8 regardless of the upstream pressure. The results of automatic flow rate control tests using open-loop control and feedback control showed that the measured flow rate satisfactorily followed the target flow rate profile.

在这项研究中，设计了一个具有可调面积的节流文丘里阀来控制使用过氧化氢的单组元推进剂推进器的推力。基于文丘里管的枢轴行程和上游压力，研究了节流文丘里阀的流量控制特性。进行了三种实验：根据销行程和文丘里上游压力测量压力和流量，确定各种条件下的临界压力比，通过开环控制和执行器反馈控制的流量控制性能。在文丘里管的上游、喉部和下游测量压力。据观察，流量与冲程和上游压力成正比。低于 10 毫米的行程，临界压力比随着行程和上游的减小而逐渐减小。然而，超过 10 毫米的行程，无论上游压力如何，临界压力比都会收敛到 0.7 到 0.8 之间的值。使用开环控制和反馈控制的自动流量控制测试的结果表明，测得的流量令人满意地遵循目标流量曲线。