055 Large Destroyer Thread II

[Jono]

yes, yes, I still remember the excitement we had when a photo of the first 052C passing under a bridge emerged.
Wow, it's got VLS, clearly shown to the public for the very first time !!
Then 054A, 052D, 052DL, and 055 appeared in rapid succession all in the span of a mere 10 years.
What a treat it has been, smiles.

 

[AndrewS]

I agree.
In fact I find it confusing that the PLA-navy is "only" building an average of 160,000 tons of warships per year, especially in today's uncertain geopolitical environment. China easily has the industrial capacity to build 200,000 tons per year, perhaps even 240,000 tons. A good place to start would be to begin construction on 2 aircraft carriers at the same time instead of just 1.

I would say Chinese aircraft carrier design still needs some time to mature. The first CATOBAR carrier hasn't been commissioned yet, nor the first Nuclear powered carrier built yet

But once they're happy with the design, I can see them building 4 carriers in the space of 5 years, like what we saw with the Forrestal-class carriers.

And remember that the current average of 4 destroyers and 4 frigates per year is likely at the very upper end of a sustainable shipbuilding plan. If they continue at this rate, we're looking at an eventual fleet size comprising 140 modern destroyers and 120 frigates.

 

[asif iqbal]

any idea when the Type 055 restart program will start ?

 

[by78]

Some nice screen captures.

 

[by78]

 

[by78]

 

[by78]

 

[by78]

106 at Zhenjiang naval base.

 

[by78]

Self-explanatory.

 

[by78]

Based on the illustrations of the exhaust stack, I think this might have something to do with the 055.

An academic paper on an optimized design of an 'exhaust ejection device' for the metal container surrounding a certain marine gas turbine. The metal container in question provides heat and sound insulation around the turbine in order to improve the working environment of the engine room. The exhaust ejection device expels hot exhaust from the turbine while pulling in cool air to lower the temperature of the metal container.

The link for the full paper in Chinese is

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, while a machine-translated version is attached to this post.

Abstract: [Objectives] The exhaust ejection device is an important part of a ship's gas turbine intake and exhaust system. It is very important to ensure the exhaust and ejection performance of the exhaust ejection device for the normal operation of the ship. [Methods] According to the characteristics of this type of gas turbine exhaust ejection device, this paper selects eight relevant structural parameters and two objective functions in order to analyze the parameter correlation, and determines the two design variables that have the greatest correlation with the objective function. On this basis, the design parameters are optimized based on the multi-objective optimization genetic algorithm NSGA-II, and the selected optimization scheme is applied to a gas turbine intake and exhaust system assembly model for verification. [Results] The results show that, compared with the original scheme, the optimized exhaust ejection device has a significantly improved ejection flow rate of the gas turbine casing, meeting the design requirements of the exhaust ejection amount, but this also leads to an increase in exhaust back pressure. [Conclusions]The research approaches and results obtained in this paper have certain reference value for the design and optimization of gas turbine exhaust ejec- tion devices.