Chapter 1502

Zhuang Jianye's words are not exaggerated at all.

Take the "Kuznetsov" aircraft carrier of the Russian navy, a brother of the "Varyag" aircraft carrier, which is now being refitted in a large shipyard in the north, as an example. It has a displacement of 60000 tons, adopts a four-axis propulsion system, is equipped with 8 high-pressure boilers, and drives four steam turbines.

The total power is 134mw, equivalent to 180000 horsepower.

It can promote the aircraft carrier Kuznetsov to have 30 knots and 18 knots of 8500 nautical miles.

The performance of the aircraft carrier "Varyag" and "Kuznetsov" is not much different. At most, the quality of the high-pressure boiler is better, but the overall power output can only be maintained at about 200000 horsepower, ensuring that the aircraft carrier has a maximum speed of 32 knots at most.

However, the proportion of huge high-pressure boilers and steam turbines has not changed; The high fuel consumption and low efficiency of this traditional power have not changed.

If d-71m gas turbine is used, it is a completely different situation.

The maximum output of a single unit is 35 MW, equivalent to 46935 HP, and the four units in parallel is 140 MW, equivalent to 187000 HP.

Although compared with the power assembly composed of new domestic high-pressure boilers and steam turbines used by the aircraft carrier Varyag under transformation, the 200000 horsepower provided by the power assembly is slightly lower.

But it is better than the 134mw and 180000 horsepower of the Russian Navy's "Kuznetsov" aircraft carrier.

At least, it's no problem to maintain a 30 knots speed of such a big ship with a displacement of 60000 tons.

However, the key is not the problem of speed and power, but the problem of space occupancy and use efficiency.

The total weight of a single d-71m gas turbine is only 27 tons, and the four combined are only 108 tons, less than half the weight of the power combination of the high-pressure boiler and steam turbine used on the "Varyag". As for the space utilization rate, it goes without saying that the compact one is called a delicate one.

The saved space and weight, whether it is to increase the number of carrier based aircraft or to equip more fuel and ammunition, is the most direct improvement of the combat effectiveness of the aircraft carrier.

Moreover, the fuel economy and flexibility of the gas turbine are much better than that of the steam turbine. At least when starting, there will be no long preheating of the steam turbine, so that at least four boilers can not be shut down after the aircraft carrier berths, so as to maintain the combat ability of the aircraft carrier to start and leave the port quickly.

This is tantamount to burning money every day for no reason.

The gas turbine is not the same. It starts very fast. It does not need to maintain operation when approaching the port and can be completely shut down. This is also very friendly to the daily maintenance and cost maintenance of the ship. At least it doesn't need to do anything, and the funds flow with the fuel oil.

Of course, to achieve this effect, the power of gas turbine must be increased, at least more than 30 MW, in order to barely meet the threshold of aircraft carrier drive.

Don't even think about the 20 MW level. After all, if the aircraft carrier is lower than the speed of 25 knots, it is not an aircraft carrier, but a real live target wandering in the sea.

Fortunately, China's take-off d-71m gas turbine has achieved the level of 30 MW. Because of this, the executive deputy group leader can no longer be described as happy, but completely excited.

Originally, even the power of mass-produced destroyers was worried. Now, the power devices on the aircraft carrier are illuminated again.

The sudden sense of happiness almost made the executive deputy group leader faint directly.

Of course, although the executive deputy group leader is excited, he is also very clear that although d-71m gas turbine is not a problem as aircraft carrier power in theory, it needs a series of adjustments and running in to achieve it.

After all, the power of the aircraft carrier is very complex, coupled with the update and iteration of supporting equipment, the demand for power has been very different from that in the past.

Although the domestic steam turbine is backward, it is not a problem for driving large aircraft carriers. In addition, with mature technology and manufacturing cost, it is enough for a modified aircraft carrier.

However, for the next generation of large aircraft carriers ready to use DC motor propulsion and electromagnetic catapults, this set of total power achievements can not keep up with the times.

In this regard, the executive deputy leader, who once served as the leader of the Navy's equipment department, was very clear that the Navy's plan for a new generation of aircraft carrier was to use nuclear power and put it in place directly in one step.

However, this scheme is highly controversial within the Navy.

The main reason is that the technical requirements of nuclear power are too large, and there is no relevant experience in China. If it is done in one step, there is nothing to say. If it is pulled to the egg at once, the gain is not worth the loss.

Just like the French "Charles de Gaulle" aircraft carrier, it is called the world's second nuclear powered aircraft carrier. As a result, it uses the reactor on the nuclear submarine, so that the speed of "Charles de Gaulle" is only pitiful 25 knots. If it is a little faster, either the nuclear reactor shell is chapped or the direct powertrain is lying down.

I'll die for you anyway.

As a result, the world's second nuclear powered aircraft carrier can only use 25 knots, a speed that can't even blow the deck wind, to show the slow and fast wind of France.

It makes the men in Paris smell silence and the women cry!

Because of this, many people of insight in the Navy hope to have a transition between steam turbine and nuclear power, so as to drive the integrated power system, promote the aircraft carrier's high speed, and provide sufficient power for the electromagnetic ejection device.

However, at the time of discussion, there was not even a decent high-power gas turbine in China, so the theory of transition type seemed reasonable, but it was not practical.

Therefore, the power of the next generation aircraft carrier has been debated since the Varyag returned home.

The executive deputy group leader is a typical backbone of the aircraft carrier power transition faction. According to his understanding, the most important thing for the aircraft carrier, a large offensive weapon platform, is the stability of the platform. If something goes wrong every day, it is not good equipment, but grinding people's skills.

Therefore, he felt that more time should be given to the nuclear industry to polish and mature the nuclear power, and even learn from Russia, use one or two types of nuclear power icebreakers, put the ship nuclear power into use, and accumulate enough experience before it is too late to get on board.

However, there was no suitable transition model between steam turbine and nuclear power at that time. Even if the opinions of the executive deputy group leader were more pertinent, it was not feasible to implement it.

But now, China's d-71m gas turbine has well filled the gap between steam turbine and nuclear power, making the executive deputy group leader look forward to the hope of transition power of large aircraft carrier!

Because of this, the executive deputy group leader spoke frankly to Zhuang Jianye and asked directly: "Mr. Zhuang, is there room for your d-71m gas turbine to increase power? It would be better if it could reach the level of 40mW. You should know that some large surface ships with a displacement of about 80000 tons have very high requirements for power, especially the new integrated electric propulsion system. At this stage, the d-71m gas turbine can only barely meet the passing line!"

Zhuang Jianye nodded: "Our d-71t gas turbine in the next stage is expected to reach the level of 40 MW, but the current d-71m gas turbine can also reach the limit power of 38 MW. If Taiji power output is not required, I think the d-71m gas turbine combined with our d-65f 12 MW gas turbine should be enough to drive the power of large surface ships of 80000 to 100000 tons ！”