According to the energy used, rocket engines are divided into chemical rocket engines and non-chemical rocket engines. Chemical rocket engines are mainly divided into solid rocket engines, liquid rocket engines and solid-liquid hybrid rocket engines according to the different physical states of their propellants. Today I will mainly talk about liquid rocket engines.<\/p>\n
1. Basic information<\/p>\n
The liquid rocket engine is one of the core devices of the aerospace propulsion system. It generates high-temperature and high-pressure gas by burning liquid fuel and oxidant, which is expanded and accelerated by the nozzle to form thrust. Compared with solid rocket engines, liquid engines have the advantages of adjustable thrust, multiple ignitions, and higher specific impulse.<\/p>\n
2. Classification <\/p>\n
According to the type of propellant component supply system, it can be divided into power units with extrusion supply system and power units with pump supply system. In the extrusion supply system, according to the different methods of generating extrusion gas, it is divided into three categories: gas storage extrusion system (or gas cylinder extrusion system), liquid gasification extrusion system, and chemical reaction extrusion system.<\/p>\n
3. Working process<\/p>\n
Taking a two-component pump engine as an example, it generally goes through three stages: starting, main stage operation and shutdown. When starting, the valve in front of the pump is opened, and the oxidizer components and fuel components are filled into all the cavities and pipelines before the combustion chamber injector through their respective delivery pipelines. Then, the turbopump assembly starts to work, the propellant enters the combustion chamber (or gas generator), ignites and burns to build pressure, and the engine gradually shifts to main-stage operating conditions. Under the main stage operating condition, the pressure in the components is increased to the required value by the boosting effect of the pump in the turbopump device, and is then injected into the combustion chamber through the injector at the head of the thrust chamber. The engine operates stably according to predetermined parameters and cycle methods. The propellant burns in the thrust chamber to produce high-temperature and high-pressure gas, which expands and accelerates outflow through the nozzle, producing reactionary thrust until the control system issues a shutdown command, all components are shut down in sequence, and the engine operation ends.<\/p>\n
4. Future development<\/p>\n
As the “heart” of the aerospace industry, liquid rocket engines’ technological progress directly determines humans’ ability to enter space. In the future, with breakthroughs in reusable technology, new materials and intelligent design, liquid engines will develop towards higher efficiency, lower cost and deep space adaptability, providing core power support for lunar base construction, Mars colonization and interstellar exploration.<\/p>\n","protected":false},"excerpt":{"rendered":"
According to the energy used, rocket engines are divided into chemical rocket engines and non-chemical rocket engines. Chemical rocket engines are mainly divided into solid rocket engines, liquid rocket engines and solid-liquid hybrid rocket engines according to the different physical states of their propellants. Today I will mainly talk about liquid rocket engines. 1. Basic […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[],"class_list":["post-25379","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/25379"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=25379"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/25379\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=25379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=25379"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=25379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}