我国首次完成液体火箭发动机“九机并联”试车 如何支撑未来大型星座组网等多样化商业场景？

Core Viewpoint - The successful ground test of the Zhuque-3 reusable launch vehicle's first-stage propulsion system marks a significant advancement in China's liquid rocket technology, demonstrating the capability for high thrust and complex integration of multiple engines [1][3][5]. Group 1: Test Overview - The Zhuque-3 rocket's ground test involved nine Tianque-12A series liquid oxygen-methane engines, achieving a total thrust of 7542 kN [3]. - The test process included a comprehensive simulation of the launch sequence, validating the integration of propulsion, structure, measurement and control, avionics, and auxiliary systems [3][5]. - The test successfully demonstrated the engines' stable operation for 40 seconds, confirming the performance of the propulsion system under operational conditions [3][5]. Group 2: Technical Achievements - This test is noted as the largest and most complex liquid rocket ground ignition test in China, marking the first successful system-level verification of nine liquid oxygen engines operating in parallel [3][5]. - The Zhuque-3 rocket features a stainless steel structure and is designed for first-stage reusability, with a launch weight of approximately 570 tons and a length of about 66 meters [3][5]. - The test results provide critical data and experience for future engineering applications and more complex configurations [3][5]. Group 3: Safety and Design Innovations - The test site was modified to accommodate the Zhuque-3's first-stage propulsion system, featuring capabilities for low-temperature propellant loading, fire cooling, and remote data monitoring [5]. - Safety measures included a high-pressure water cooling system to protect the test structure from high-temperature exhaust during engine ignition [5][6]. - The test adhered to strict quality and safety management protocols, ensuring structural stability and safety during high-thrust conditions [5][6]. Group 4: Future Plans - The company plans to conduct the first flight of the Zhuque-3 in the second half of this year, with three flight tests anticipated [9]. - The goal is to achieve the first successful recovery of a first-stage rocket in China this year, transitioning to reusable rocket operations by next year [9]. - This initiative aims to significantly reduce launch costs and support the deployment of high-density low-orbit internet satellite constellations [9].