QuoteThere have been reports that Yuzhnoye Design Office in Ukraine has been destroyed. Yuzhnoye is the manufacturer of the 1st stage Antares tank, so if these reports are true, then Antares will never be able to launch again after NG-19.https://twitter.com/SpaceAtWallops/status/1497231580217098243https://twitter.com/JURISTnews/status/1496847074465357825SCE-200 might be indefinitely delayed now...
There have been reports that Yuzhnoye Design Office in Ukraine has been destroyed. Yuzhnoye is the manufacturer of the 1st stage Antares tank, so if these reports are true, then Antares will never be able to launch again after NG-19.
To meet ISRO’s objective of achieving higher payloads of 5 tonnes and above in GTO, a powerful, efficient and eco friendly stage was envisaged and this led to the development of Semi cryogenic engine and stage. LPSC has configured and designed a semi-cryogenic core stage, dimensionally optimized to replace the L110 stage of GSLV Mk III. The stage with 120 tonnes of propellant loading and powered by a single SE2000 engine producing a thrust of 200 tonnes will enable GSLV Mk III to carry more than 5.1 tonnes of payload to GTO. Semi-cryogenic engines operate on purified Kerosene (Isrosene) and Liquid Oxygen as propellants and is a combination of high performance, cost-effectiveness, high density impulse and eco friendliness.The engine and stage development is presently at an advanced stage. Engine and stage systems/subsystems have been realised and further testing, qualification and flight stage delivery are progressing as planned.
HAL delivers heaviest semi-cryogenic propellant tank to IsroThe heaviest semi-cryogenic propellant tank (SC120-LOX) ever fabricated by Hindustan Aeronautics Limited (HAL) has been delivered to the Indian Space Research Organisation (Isro). The semi cryo-liquid oxygen (LOX) tank — the first developmental welded hardware — is a part of the SC120 stage intended for payload enhancement by replacing the L110 stage in the existing Mk-III launch vehicle. Last year, HAL had delivered the biggest-ever cryogenic liquid hydrogen tank (C32-LH2), which is four metres in diameter and eight metres in length, much ahead of contractual schedule.
ISRO Chairman Dr. Somnath S said in Varanasi - 'India's first semi-cryogenic engine will be launched after three months'Dr. Somnath told that ISRO is now working on completely indigenous technology. Three months later, the country's first semi-cryogenic engine will be tested. It will have a fuel capacity of 200 tonnes. After its success, the payload capacity of GSLV Mark-III will be increased from four tonnes to 5.5 tonnes. It will be based on kerosene and hydrogen and oxygen oxidizer in the semi cryogenic engine.
LPFT Straightener helps in channelising the flow coming into the pump of the propulsion system.
Closed Impeller is part of the fuel delivery system
Numerical simulations are performed for 60%, 100% and 105% thrust conditions at the inlet duct to the main LOX pump in SCE-200, a staged combustion cycle based semi-cryogenic rocket engine, indigenously being developed in India.
To power future heavy lift launch vehicles and manned space missions, ISRO is developing a 2000 kN oxidizer-rich staged combustion cycle based semi-cryogenic rocket engine SCE-200. As in typical staged combustion cycle based rocket engines, the gas driving the booster turbine is recirculated and mixed with the pump outlet to increase the cycle efficiency . This leads to condensation of hot turbine drive gas (predominantly oxygen and small amounts of CO2 & H2O) when it comes in direct contact with subcooled liquid oxygen at the inlet duct to the main LOX pump[2,3] as shown in Figure 1.Very few researchers [2,4,5,6] have studied this typical direct contact condensation problem occuring at crygenic temperatures, whereas, lot of studies have been reported for the case of steam-water direct contact condensation.
A two fluid Eulerian multiphase model has been implemented in the commercial CFD package ANSYS CFX® to simulate the direct contact condensation process of oxygen vapor jets in flowing subcooled liquid. The plots of plume shapes and heat transfer coefficients for different thrust conditions are plotted and the results were analyzed. It has been observed that the rate of condensation increases with increase in thrust. Since, the vapor and liquid have higher mass fluxes at higher thrust conditions, the plume shapes does not decrease much though the heat transfer coefficients are high. In addition, it has been observed that the vapor plumes escape the pipe domain, which hints the need for modification of the inlet duct size in future.
Thermo-hydraulic simulation of lOX Booster Turbo-pump for Semi-Cryogenic Rocket Engine:SC-2000, India’s indigenous semi-cryogenic rocket engine, is being developed at ISRO’s LPSC. This project helped to develop the Low-Pressure Oxidiser Turbopump (LPOT), which is part of the SC-2000’s staged combustion cycle. In this project, the axial pump in LPOT is powered by a partial admission impulse turbine, which is run by the oxidizer-rich combustion products (hot gas) from the pre-burner. The hot gas at the turbine exit mixes with LOX from the pump exit, forming a multi-component multiphase flow with phase change, leading to solidification of CO2 and H2O.
ISRO is in talks with Roscosmos to supply the engines RD-191M: https://www.militarynews.ru/story.asp?rid=1&nid=586029&lang=RU
About the semi-cryogenic engine, Somanath said ISRO is developing one to replace the LVM-3 or Launch Vehicle Mark-III, previously known as the Geosynchronous Satellite Launch Vehicle Mark III or GSLV Mk III.
According to him, it is a 200-tonne engine, which ISRO has been developing for the past 15 years. "This engine has now reached the first powerhead. The assembly has already been done. We have built a huge test facility. It was commissioned just last month and we have installed it and done the first ever propellant feed into it (sic). So it's successful now," the ISRO chief said.
He added that in another few days the first firing of the engine will take place, followed by six to seven tests, which will take place every two weeks under different conditions. If the tests are successful, the next phase will be to work on the hardware, Somanath said.
He also explained that ISRO had initially planned to conduct the tests in Russia and Ukraine because they had the facilities to conduct the tests, but now due to war those locations are not accessible. "Now the geopolitical situation does not allow us to go there," Somanath said, explaining that it made the space agency accelerate the construction of such a facility in India. "I am happy that the industry is supporting us so much to build a huge facility, which has just been commissioned," he added.
In a major technological breakthrough that will eventually add more lifting-power to Indian rockets, the Indian Space Research Organization (ISRO) successfully test fired its most powerful-yet rocket engine. Chairman ISRO Dr. S. Somanath confirmed the development to WION. The test firing was conducted at the ISRO Propulsion Complex(IPRC) in Mahendragiri, Tamil Nadu.
After a series of further tests are conducted and this engine is fully qualified, this 2000kN thrust engine and its stage(associated components, fuel tanks etc.) will be replacing the current L110(liquid-fuel core stage) of India's largest rocket - Launch Vehicle Mark 3 (LVM3).
ISRO has successfully performed the first proper test firing of the SCE-200 engine! #ISRO
Looks like the test wasn't as much of a success as previously anticipated.At 2 seconds into the firing there was a spike in turbine pressure followed by loss of turbine speed causing the test to be aborted.Regardless, this is a massive milestone in the SCE-200 program! #ISRO
First hot test of the Semi-cryogenic engine conducted at IPRC, MahendragiriJuly 3, 2023On July 1, 2023, ISRO conducted the first hot test on an intermediate configuration of the Semi-cryogenic Engine, known as Power Head Test Article (PHTA) at ISRO Propulsion Complex (IPRC), Mahendragiri, Tamil Nadu. The test was conducted towards developing a 2000 kN thrust semi-cryogenic engine to power the booster stages of future launch vehicles.The objective of the test was to validate the integrated performance of the critical subsystems such as the gas generator, turbo pumps, pre-burner and control components by carrying out a hot-firing for a short-duration of 4.5 s. The ignition and generation of hot-gas within the pre-burner chamber that drives the main turbine to drive the fuel and oxidiser pumps, was focussed.The test proceeded as predicted till 1.9 s validating the ignition and subsequent performance of PHTA. At 2.0 s, an unanticipated spike in the turbine pressure and subsequent loss of turbine-speed was observed. As a precautionary step, the test was terminated. Analysis under progress would offer further understanding before proceeding with further hot-tests for longer duration.The semi-cryogenic engine utilizes a propellant combination of Liquid Oxygen (LOX) and Kerosene, and the power head test article forms the first hardware test of the engine development program. The test was carried out the dedicated test facility recently established at IPRC for testing semi-cryogenic engines and stages. ISRO had commenced the testing of the PHTA in May 2023 at this facility.
Looks like test failed
However, the story of LVM-3 thread"Semi-Cryo engine will be applied from LVM-3 M4"does not match the reality of engine development at all.https://forum.nasaspaceflight.com/index.php?topic=36389.160Any updates on when Semi-Cryo will go live?